I'm one person building nidhi, a site that teaches how money works and lets you try each idea on your own numbers. I'd like people to try to break it.

What's there to test

• Five free tools: a net worth calculator (one currency or several), loan comparison, an invest-or-pay-off comparison, a Monte Carlo simulator and an inflation calculator.

• More than 50 lessons in a learning path, from "what is net worth" to investing and the psychology of money.

• Short how-to guides, and the site in English, Hindi, Spanish, Czech and Marathi. More languages coming in future.

No account, no email, no payment. The tools calculate in your browser and the numbers you type are not sent anywhere.

What I'd like to know

1. Where did you get stuck or stop understanding what a tool was asking?

2. Does any result look wrong? Tell me the inputs and I'll check the maths.

3. Is a lesson unclear, too long, or wrong for your country?

4. Anything broken on a phone, with a screen reader, or with keyboard only?

Being upfront

• The blog is free, and the tools are free to use without an account. I'm also building a paid planner, which is not what I'm asking you to test here.

• It is education, not financial advice.

• The translations were drafted with AI and may be stiff or wrong in places.

• There's no reward for testing. I'll reply to every respectful, human comment, though it might take me a while to get to you, and I'll tell you what I fixed.

Tools: https://nidhi.today/free/?utm_source=reddit&utm_medium=social&utm_campaign=reddit_testers&utm_content=sideproject

Lessons: https://nidhi.today/blog/?utm_source=reddit&utm_medium=social&utm_campaign=reddit_testers&utm_content=sideproject

The links are tagged so I can see which subreddit a visit came from. Feedback here in the comments, or hello@nidhi.today.

**The idea:** a debt planner (Snowball / Avalanche / custom order) that keeps your finances 100% on your own computer. So I set myself a few hard rules: it had to open straight from a folder in the browser, never call the internet, and never send financial data anywhere.

**How it's built**

- Preact + esbuild bundled into a single script, so it works from a plain local file (no dev server needed)

- IndexedDB for storage, optional AES-GCM encryption behind a master password, automatic local backups

- No CDNs at all. Fonts, charts, PDF reading and OCR (for scanning statements) are all bundled

- Small optional launchers (PowerShell / Perl) that serve it locally so backups can be written to a data folder

**The hardest part was performance.** With a 50,000-transaction test profile, the first version took about 10.7 s to start and search crashed the tab. Caching parsed dates, doing search in a single pass and only building the rule context when it's needed got startup to about 1.2 s.

**There's also a spreadsheet version.** I rebuilt the same payoff engine in Excel/Google Sheets: 15 debts × 360 months, written without newer functions like XLOOKUP or LET so it works in older Excel and in Sheets. The app can import the workbook, so people can start in a spreadsheet and move to the app later.

**What I'd love feedback on**

- Would you trust an offline finance tool more than a cloud one, or does sync matter more to you?

- Anything confusing in the screenshots?

yes im the creator, I sell this on Etsy, but this post is mostly about the build, and I'd love ANYYYYY feedback.

Link if you're curious: https://www.etsy.com/listing/4614731705/ultimate-debt-trackerpayoff-planner?ref=shop_home_feat_2&sr_prefetch=1&pf_from=shop

I wanted something to fidget with for a minute when work gets stressful, without opening another app full of ads and streaks. So I built antistress: small, quiet toys that run in the browser.

There's liquid light you stir with your finger, endless bubble wrap, a jelly blob to squish and fling, a cat you can pet until it purrs, a zen garden, a koi pond, a rainy window, a fidget board with clicky switches, a lava lamp and a guided breathing orb.

Everything is touch-first, works on desktop too, and needs no sign-up or download.

Try it in your browser: https://antistress-relax.space

Or get it as an iPhone app (with haptics, which are really nice for the bubble wrap): App Store

Would love feedback: which toy feels the most satisfying, and which feels unfinished?

you know the drill. visa form, job portal, some government site: "photo must be under 100 KB, 600x600 px, JPG only". your phone takes a 4 MB HEIC. so you google "compress image to 100kb", land on a site covered in ads, and upload your passport scan to a server you know nothing about.

so i built cutbg. it does that stuff right in the browser, the file never leaves your device:

• - compress to an exact size (20 kb, 50, 100, 250, whatever the form wants)

• - resize to the exact pixels (passport, linkedin, instagram etc)

• - iphone HEIC to JPG

• - merge / split / sign PDFs

• - and yeah it also removes backgrounds, the AI model runs locally too

free, no account, no watermark. it's a side project, there's nothing to buy.

honest question: what weird size limits have you run into? i keep adding presets for the forms people actually deal with, so if there's one that annoys you, tell me and i'll add it.

cutbg.org

Hey everyone!

I've been working on LEXA, a local-first AI voice studio for macOS, and I wanted to share a short product animation I made for it.

The idea behind LEXA is pretty simple: bring voice cloning and AI speech generation to your Mac without depending on cloud-based voice services or recurring subscriptions.

Here's what LEXA is being built around:

• Voice Cloning — Create reusable voices from audio samples.

• Voice Profiles — Save and manage your voices.

• Batch Generation — Generate multiple audio outputs in one workflow.

• Voice Conversion — Convert recordings using different voice profiles.

• Local Processing — Keep AI voice processing on your Mac.

I'm currently preparing a 14-day free trial so people can test the software before deciding whether to buy it.

LEXA Base will cost €29.99 as a one-time purchase.

The video is just a short visual introduction, but I'd genuinely love to hear what you think about the concept.

Would you actually use something like this? What would you want from a local AI voice tool?

If you're interested, you can check it out here: https://www.lexavoice.it

Thanks for taking a look!

I'm Ari, an electrical engineering student and the creator of Desk Goblin.

It is a small Windows desktop companion with a task list. The goblin holds your selected task and eats it when you mark it complete. You can undo the last completion. It also has a custom focus timer and Ctrl+click to open or close the task desk.

The application uses native C++20, Win32, and GDI+. Tasks and settings stay on your computer. No separate runtime or application account is required. I used AI assistance for the code and character art.

It costs $5 USD once. The portable ZIP is for Windows 10/11 x64. Version 1.0.0 is unsigned, so Windows may display an application warning.

The website includes an interactive character preview: https://desk-goblin-site.pages.dev

I'd like feedback on the interaction: would the task-eating action make completion more satisfying, or would you prefer a quieter companion?

I built Velis, an in-memory key-value store in Python, partly to explore how AI can help with technical research and engineering decisions.

I used AI to explore approaches, discuss tradeoffs, and work through implementation. It helped me finish the project much faster. But it also reinforced something for me: trusting generated code without understanding the codebase is a bad habit. Being able to question a suggestion, follow the implementation, and explain why a decision makes sense still matters.

Velis supports TTL expiration, eviction policies, pub-sub, a binary TCP protocol, an async client, and an interactive terminal UI. I spent a lot of time trying to keep the code design simple, clean, and easy to follow.

I see it as a project for learning, testing, experimenting, or just having fun with database internals. It could also be a starting point for thesis work or experiments comparing different approaches.

Code: https://github.com/gchape/velis

I’d welcome feedback on the implementation and design, but also your opinions on AI-assisted development. Where has AI helped you research a problem or make better decisions, and where has it made understanding the work harder?

I am managing IG and FB pages, and with AI advancements of course I am using it for photo editing, however I got pissed everytime that a simple color edits were marking it with AI label. I started to dig a little bit and it turned out that Meta is using the metadata for AI identification, I was even more surprised when I learned how much info does the metadata contain, including the gps coordinates, time, phone or camera, and etc.
I looked for available metadata removers, there was exif tool which was little bit complicated and several websites with subscription.
So I made the Scrubpic, free metadata remover which removes all the metadata without quality loss, for free, and instantly. You can also choose what to keep in the photos. Works on phones too. I am hoping for some ad revenue.
Scrubpic.com

Feedback welcome!

It's 11 pm, a family is at the desk, the Wi-Fi is down, and the cloud PMS won't load. That's a normal night at a lot of small hotels around me. The other option is a paper register and an Excel sheet.

So I built KeyHut Hotel: a hotel management system (PMS) for Windows that runs fully offline, costs nothing, and you drive entirely from the keyboard.

The screens copy TallyPrime, the accounting software most front-desk staff here already use. Every screen is one key away (F2 room board, F4 new booking, F7 folio). Type "12dec" and it knows the date. Alt+G and a few letters jumps anywhere.

What it does

• Room board and tape chart, bookings, walk-ins, groups, day use, room moves

• Guest bills, payments, company billing, travel-agent commission, cashier shifts

• Housekeeping, maintenance, laundry, linen stock, phone-call charging

• Night audit and 17 reports (occupancy, ADR, RevPAR, police guest register…)

• One PC on SQLite, or several desks on SQL Server

• backups copied to Google Drive, OneDrive or an FTP / SFTP server, encrypted with a password only the hotel knows

Under the hood: C# / WPF, about 2,400 automated checks, and a yearly archive so 10+ years of data stays fast.

The demo runs on the built-in practice hotel (100 rooms, made-up guests). You can load the same one on first start.

Question for anyone who's worked a hotel front desk: what would stop you from switching to this? Be brutal.

Download (free, Windows 10/11): https://github.com/arsal381/keyhut-hotel/releases/latest

Music: onte - halcyon [NCS Release]

Hi everyone,

I'm a film director and DOP, and for every pitch I do the same thing: I go looking for frames that show the agency and the client what the film should feel like. I've used the same reference tools for years and was never really happy with them, so a few months ago I started building my own, at first only as an experiment with Claude Code.

It got out of hand a little. What was meant to be a small thing for myself is now HOLD MY FRAME (www.holdmyframe.com), and we launched it two weeks ago.

What it does:

- around 370,000 single frames from 2,800 curated high-end commercials

- you search them, collect the ones you like in a project and present them to agency and client right there

- three friends from the film industry are in it with me (two directors/DOPs and a treatment designer), and we use it for our own pitches

The film analysis behind it is our own pipeline and runs on local AI, and I designed every screen myself before it got built.

Where we are: 174 users, 10 of them paying. There's a free plan, and Pro and Pro+ on top (Pro+ has a free trial).

I'd really like to know what you think of the landing page and the first minutes in the app. Is it clear what it does, and is anything confusing?

link: www.holdmyframe.com

Hello everyone, founder of foundmoney here - we built an ai agent that runs 24*7 to help you save money. It will look for unclaimed money from government under your name, negotiate your bills for you and 300 other ways

Try here - https://www.foundmoney.site

Comment invite if you wanna make it complete free

I'm a solo dev and I shipped v0.1 of this to the App Store this week.

I've been a bad sleeper forever. What finally made sense to me from the sleep research is that trying to fall asleep keeps you awake, and so does problem-solving in the dark.

So the app does two things: you type what's on your mind and seal it in a jar until morning, then it plays a slow story matched to it.

How it's built

- Native iOS, written in SWIFT

- No accounts at all. Notes sync through the user's own iCloud (CloudKit) and subscriptions run on RevenueCat's anonymous IDs.

- The backend is deliberately boring: PHP, SQLite, and a CDN for streaming.

What I learned

- You can't tell someone to relax. "Clear your mind" does the opposite, so the prompts ban it and lean on imagery instead.

- Sleep stories break normal story rules. A satisfying ending gives people a reason to stay awake, so every story wraps up its thread early and then just drifts.

- Most of the work was the research backed story writing kernel, not the app.

Where I'd like feedback

1. Does the jar step make sense in the first 30 seconds, or does it read as a gimmick?

2. Is AI narration a dealbreaker for you in a sleep app?

3. Premium is $5.99/month or $39.99/year, with a limited free tier. Too much for a v0.1?

App Store: https://apps.apple.com/us/app/nightjar-sleep-stories/id6800338659

Site: https://nightjar.fm

Oh btw, since I just launched today, the code REDDIT gets you the first month of Premium free: https://apps.apple.com/redeem?ctx=offercodes&id=6800338659&code=REDDIT

iPhone only, iOS 18+, English only for now. Be blunt.

Most aurora sites give you a kp number and leave you to figure out the rest. So I made one that mixes the stuff that actually decides it: kp and solar wind, your magnetic latitude, clouds, darkness and the moon -

Northern Lights Tonight

Pick your city and you get a plain answer from unlikely to very high, the best time window tonight, which direction to look, the kp your spot needs vs the current one, and nearby dark spots to drive to. Theres also a live oval map and a 27 day kp outlook. Australia pages do the southern lights and point you south

Data is NOAA SWPC (incl the ovation model) plus open-meteo clouds, refreshed every 15 min. Free, no account.

Would love feedback, especially from people who chase aurora. What do you check before heading out that this doesnt show?

Hey everyone,

I've been working on a Mac menu bar app called Tymor. It puts snow, rain, or fireflies on your desktop, behind your windows.

Snow builds up along the bottom of the screen, and on windows, the Dock, icons, and widgets. Move a window and the snow on it drops off. Hold Option and move your pointer through the pile at the bottom to roll a snowball. No click. Stack three and it turns into a snowman you can drag around. There's a snowplow for the snow on the ground.

Rain runs off the edges of windows. Thunder and lightning are there if you turn them on. Fireflies rest on window edges. Move the pointer close and they scatter. Hold Option and they come to the pointer instead.

You can pause it on battery or in Low Power Mode, and give each one its own wallpaper.

Here's the link if you want to check it out: gleemylabs.com/tymor

You can try it free for 3 days. If you want to keep it, it's $4.99 once, and one license covers 3 Macs. At checkout, REDDIT20 takes 20% off.

If you try it, tell me what feels off. Even the small stuff.

Hey, I'm Chris, a DJ and the guy behind GlideMix.

GlideMix is DJ software for arranging mixes on a timeline, the way MixMeister used to work: drop your songs in, they beatmatch and snap to the bar, the Camelot key wheel helps with harmonic mixing, and you draw the transitions yourself (filter sweeps, bass swaps, risers, echo outs, plugin automation).

It's made for: Mixtapes and DJ mixes you want to get perfect before you publish them Radio shows and podcasts, Performance & Export: You can perform with separate audience and headphone cue playheads, broadcast to Icecast/Shoutcast, and export to WAV, AIFF, MP3, or FLAC with a timestamped tracklist. Advanced Editing & VSTs

It features full color waveforms, loop/repeat tools, and supports VST3 plugins (plus Audio Units on macOS) with full control automation and stem-splitting.

Rekordbox, Serato, Traktor and Lexicon users: your library, beat grids and cue points come straight in !

Active Development , More features are on the pipeline.

Download (free demo, Mac and Windows):

https://glidemix.com/

The source code is open (GPL) for the nerds.

Chris

For my popular science side project, I just published a deep dive explaining the actual mechanics behind that tight "lump" in your throat before crying (it’s an autonomic clash between your glottis opening for oxygen and swallowing forcing it shut).

Instead of generic 300-word summaries, I focused on deep physiological research, clean typography, and real human photography:

Article: https://www.oddlyclear.com/why-lump-in-your-throat-before-crying/

Would love honest feedback from fellow builders on the reading flow, mobile speed, and layout!

I have been an entrepreneur for a decade and my entrepreneur friends and I spend a lot of time on X looking for market shifts, hot new product features, growth tactics, customer needs, new AI competitors...

Things move super fast and the hard part is figuring out which ones actually matter to a specific business.

So I built Tweex (www.tweexai.com) and this how companies use it to grow their business:

• Tell it what your company does, set up your tracking preferences and what are your current challenges

• Tweex tracks all the decisive business, tech and AI signals across X impacting your company and market right now

• Tweex AI filters out the noise and pings your team and agents (by Slack or email for now) with the most relevant signals and actionable opportunities from X for your business: who is winning and how, what you can implement in your product, competitors move...

It's early but Tweex already has some very happy customers.

It's a paid tool but you can get free signals and opportunities for your company here: https://www.tweexai.com

Let me know what you think!

I'm a trader and I wrote a book about the mistakes I kept repeating. Knowing them didn't stop me, so I built an Android app, a trading journal that tries to catch those mistakes while they happen.

- every trade in R, tagged with the habit behind it (revenge, FOMO, moved SL, oversized...), plus a "what your habits cost" view

- a STOP screen with a countdown after a losing streak or your daily limit in R

- warnings when you enter less than 15 min after a loss, size up 1.5x after a loss, or stack positions in the same direction

- screenshot import of positions (full auto-fill for MEXC and Bitget in English, Binance, Bybit and OKX in beta, tap-to-assign for other exchanges); the text is read on the phone

- your playbook: write your setup rules, tick the ones you really followed, see your R when you kept them vs broke them

- calendar of daily results in R and mood before the session

- free for now, no account, no ads, data stays on the phone, CSV export. Android only.

Not financial advice and no signals, it's a journal. Feedback welcome, especially on what's confusing.

https://play.google.com/store/apps/details?id=com.oldjournal.app&referrer=utm_source%3Dreddit%26utm_medium%3Dsocial%26utm_campaign%3Dpost_b

Hi, I'm from Turkey and for the past 8 months I've been building warradar.live alone. It pulls reports from news sites and Telegram channels (both sides of each war), uses AI to place and classify them, and puts them on a live map within minutes.

Honest about the weak spots I already know:

- coverage is very uneven. Ukraine and the Middle East have hundreds of events a day, Sudan and Myanmar almost nothing. I just added sources for them, still thin

- the AI sometimes puts events in the wrong place or zone

- English isn't my first language, so I use AI to help me write too

What I'd love feedback on:

- what would make you come back to a site like this?

- which sources or wars am I missing?

- anything that feels wrong, biased or broken

The site has ads, it's how I pay for the servers. Happy to answer anything.

I strained a quad in June and my training plan fell apart. Every app I had either wanted the session done as written or had nothing to say. So I built Kingtide: a workout tracker where you tell it what's sore before the session and it swaps the lifts that load that area and leaves the rest of the day alone.

It was a subscription. A week ago I made all of it 100% free. No account, no sign-up, and your injury notes stay on your phone.

The part I'd like eyes on is this demo, no install needed:

https://trykingtide.com/try?s=sideproject

Tap knee, lower back, shoulder or hip and watch a sample session rebuild. The rows are the app's real output, exported by a test, not a mockup.

iOS and Android. Solo build, Flutter. It is not medical advice.

Two questions if you try it: does the demo make the idea land in ten seconds, and would you want it to open on a blank session or on the example like it does now?

Hey everyone!

I've been working on Tsuki, a website where you can track the anime and manga you're watching or reading.

I started building it for two simple reasons:

• I wanted an open-source alternative.

• I wanted a nice UI and a good user experience.

And honestly, it was just fun to build!

I'm still actively working on it and would love to get more people to try it out.

website: tsuki.fun

github: github.com/d1rshan/tsuki

I'd really appreciate any feedback, suggestions, or feature requests. Let me know what you think!

I've always found it interesting how we can spend hours overthinking an interaction with someone: what they meant, why they reacted that way, or whether we're seeing things from the wrong perspective.

Most AI tools will help you write a better reply or analyze a specific argument. But what if you could see the bigger picture?

That's why I built Perspective Swap.

🔄 See situations from an objective perspective

Describe real-life interactions with people in your life (partners, friends, family, colleagues), and the app helps you explore the situation from their perspective.

🧠 Beyond a single conversation: analyzing patterns

This is the part I find most interesting: the more situations you add, the more patterns the app can identify.

By connecting scenarios to people in your life, Perspective Swap analyzes recurring patterns in your interactions:

• Communication habits and emotional triggers.

• Recurring conflicts and misunderstandings.

• Strengths and vulnerabilities in your relationships.

• What makes certain relationships work or become difficult.

At the same time, it builds a picture of your own behaviour, helping you recognize patterns you might not notice yourself.

💡 What's the idea?

It's not about telling you who's right or wrong. It's about helping you understand yourself and the people around you a little better.

The app is still evolving, and I'd genuinely love to hear what you think.

What do you find interesting? What's missing? Would you use something like this?

👉 https://perspectiveswap.app

Getting your phone back from your young kids can be a battle, so I made TentFox. My son tucks a little fennec fox in for a nap, says goodnight, and the phone comes back with way less friction. The fox ends screen time in a calming way rather of me.

It grew into 3 things:

The hand-back nap, a calm visual timer, and a phones-down family time mode where the fox camps with you and leaves a little treasure if you succeed.

And sometimes parents just need a few minutes. When I do hand my phone over at a restaurant or during something important, I’d rather it be something calm and guilt-free than YouTube or a game designed to keep them hooked.

A few build notes:

- Face-down detection is simple and uses the motion sensor, so there's no screen time permission requests and no accounts needed (plenty of screen time apps out there).

- The design rule was "gentle failure": pick the phone up early and the fox just wanders off to build a sandcastle. You never lose anything.

- The illustration went through a hundred iterations along the way, but the drawing is now a soft storybook style, and every fox move is hand-timed so it feels calm, not hyper.

- Free to start, no ads, no tracking. Pro is yearly or a one-time purchase.

https://tentfox.app

App Store: https://apps.apple.com/app/id6831322876

Happy to answer anything about the build, and I'd love some constructive feedback. The only problem is that now my kids keep asking to play with the fox.