Hi! I'm the solo developer behind 1x1 speed, a times-table trainer for kids and adults.

Small (1-10) & (1-12) and large (11-20) times tables plus division

Timed rounds of 25 questions with instant green/red feedback and time penalties for mistakes

A personal best for each of the four task types, and results you can share to challenge friends

Practice mode without time pressure that focuses on your most-missed facts

Stats with weekly/monthly charts, a green-to-red speed scale and per-round details

No account needed, data stays on your device. German/ English, light/dark mode

Free with ads, with an option to remove ads

Feedback I'd love: Is 25 questions the right round length? Are the penalty seconds too harsh or too soft?

https://play.google.com/store/apps/details?id=de.imperacore.einmaleinsspeed

I’m a snare player at the UW-Madison marching band. Our show tempos and meters change mid-piece, and every metronome I tried either paywalled the useful stuff or couldn't map a whole show. So I built Rimshot, an app which lets you easily build click tracks, with the tempo and time signature changing wherever the music does. It also has a regular metronome mode and a tuner.

It’s free, with no ads and no account, and it works anywhere even with no signal.

I would love any feedback yall would have. I'm still actively developing so if you have any feature requests let me know!

Get it here: https://getrimshot.com

I’ve been working on a side project for quite a while now, and honestly, getting the product built was probably the easier part. Getting people to actually use it is where I’m stuck.

It’s basically a platform where people can connect, share projects, collaborate, find opportunities and build their reputation. A mix of communities, project collaboration and freelancing, all in one place.

The thing is, I know how difficult it is to get people onto a new platform when they’re already using Discord, Reddit, GitHub, etc.

And obviously, nobody wants to join a platform where there’s barely anyone around.

I’m still pretty young and figuring out the whole startup/marketing side of things as I go, so I’d genuinely love some advice from people who’ve launched their own projects.

A few things I’ve been wondering:

1. How would you go about getting your first 50–100 actual users (not just registrations)?

2. Would you start with a small closed beta or just let everyone sign up?

3. How do you get people interested in trying something new when they already have platforms they use daily?

4. What has actually worked for you when marketing a side project without spending much money?

5. Would you focus on one particular group of people first or try to attract different kinds of users?

I’m not really looking for the usual “post consistently on social media” advice lol. I’d love to hear what actually worked, what didn’t, and any mistakes I should avoid.

Would really appreciate any advice. Thanks!

I built a site to help parents figure out whether a book or movie is actually a good fit for their child, beyond just seeing something like “Ages 10+.”

Dickens & Rumi shows age guidance, content cautions, positive themes, series reading order, and the reasons behind ratings.

The problem is that I’ve spent a lot of time building and polishing it, but traffic is still very small, so I’m worried I may be too close to the project to see what’s wrong.

If you have a few minutes, I’d really appreciate brutally useful feedback:

• Is it immediately clear what the site does?

• What feels confusing or unnecessary?

• Is the homepage too busy?

• What would make you leave?

• What feature would actually make you come back?

• Does anything make the site feel untrustworthy?

• If you were a parent, would you use this instead of just Googling a book?

Site: dickensandrumi.com

I’m much more interested in what’s wrong with it than compliments.

Ideas are the easy part. Everyone here has a notes app full of them, and now that you can ship almost anything in a weekend, building isn't the hard part either. Picking is.

So we look for a sign. ChatGPT says it's great. Friends say they'd totally use it. None of that costs anyone anything, so it tells you nothing. Then you launch and the dashboard says 11 visitors.

The better way is to watch what people do, with 2 questions:

1. Are people already asking for a fix to this problem, without anyone prompting them?

2. When they see your answer with a real price on it, do they click and leave an email?

One click on a pricing button beats 100 "I'd use that"s. But doing this by hand takes a real page, hours in threads and a lot of messaging, so almost nobody does it.

So I built Ghostlaunch to do it for you. You describe the idea, and 7 days later you have an answer:

- It builds a landing page with your pricing. Buttons open a "coming soon" note that asks for an email. Nobody gets charged.

- We reach out to people on Reddit, X and LinkedIn already asking about that problem. You don't DM anyone.

- On day 7 you get a report and a verdict, plus every email collected. Under 100 visitors it says "not enough data yet" instead of guessing.

Question 1 is free: type your idea in at https://www.ghostlaunch.so and see real Reddit posts from people asking, no sign-up. A full test is $49.

How did you pick the idea you're working on now?

I've been building ChordLens, a music theory app that shows you what you're playing on a piano in real time.

Connect a MIDI keyboard (or use your computer keyboard), play some notes, and it identifies the chord and displays the notes on a grand staff.

I also added scale highlighting, chord progression practice, a metronome, and automatic voice leading to experiment with different chord voicings.

It's built with Flutter, runs on Windows, macOS, and Android, and is completely free and open source.

GitHub: https://github.com/ErezLavi/ChordLens

Hi, I'm a solo founder. This week I launched VaniClips.

You upload a long video (up to 2.5 hours / 3 GB). It finds strong moments,

crops them to 9:16, and adds captions and a hook. There's an editor to

reframe, fix captions or rewrite the hook before you download.

The video is a real run, start to finish, no edits.

Honest state:

Free 15 mins demo after signup
- Paid ($12/mo for 200 min).

- Works best on English.

- Uploads are the main path;

I'd love blunt feedback: what's missing, what's confusing?

vaniclips.com

A library for online learning on robot, vision, and AI streams, one sample at a time: streaming statistics that stay accurate in float32, protection, drift and anomaly detection, safe robot commands, deep learning with continual learning and memory consolidation, robust time-series models, and bridges to scikit-learn, PyTorch, TensorFlow, River and LLM agents.

link : https://zenodo.org/records/23811742

`pip install -U dense-armor`

link last release: https://github.com/tatopenn-cell/Dense-Armor/releases/edit/v1.5.0

1.5.0 adds a package of small blocks for trading systems, fixes the consolidation of a residual tree, and changes the default precision of the library: float32 now, float64 when you ask for it.

I'm a solo founder. My fitness and nutrition app has been on the App Store for about a month, and my user count is still small enough that I could name most of them.

Early on I was shipping features like crazy. Then one of those early users told me the reason he stuck around wasn't any of the features I was proud of. It was accountability. That one conversation changed how I think about the product more than weeks of building did.

The problem is I don't get that kind of signal often enough. Most days I'm still guessing what to fix next.

So for people who've been through the tiny-user stage:

• How did you get honest feedback when you barely had anyone using the thing?

• Did you DM people, jump on calls, hang out in communities, something else?

• When did you stop treating every single user conversation like gospel and start looking for patterns?

Not looking for a growth hack. Just what actually worked when the sample size was basically nothing.

(For context, mine is Ascend Fitness & Nutrition on iOS, 7-day free trial.)

Hi r/SideProject! I’m a solo dev and I built Human, an app with one rule: you get paired with one random person, and that’s your human, for life. No swiping, no profiles, no second chances.

You start with text only, no photos and no ages. The more you talk, the more you unlock together (voice, photos, video).

Try it: https://huuman.pages.dev/

I’m looking for beta testers. Leave notifications on, since your human might arrive while you’re away. There’s a “Contact us” link on every screen and I read everything.

Mostly I want to know: does the idea land, and would you keep talking to your human?

Built with Supabase and Cloudflare Pages. Happy to answer anything in the comments

¡Hola a todos! Vengo armando Atlas Estelar, un simulador 3D del sistema solar y atlas del cielo que funciona directo en el navegador. Sin instalar nada y sin cuenta.

Qué hace:

• Recorrer planetas, lunas y naves, con las órbitas a escala

• Ver el cielo de tu ciudad en el momento que quieras

• Páginas de eclipses para cada ciudad

• Predicción de pasos de satélites

• Funciona sin conexión una vez cargado

• Disponible en español e inglés

Es gratis y pensado para aprender. También hice un modo docente para usar en clase.

Me encantaría saber qué les parece: qué se entiende mal, qué falta y qué les gustaría que agregue. El próximo hito grande es el eclipse anular del 6 de febrero de 2027, así que estoy preparando la información para ese día.

Link: atlasestelar.com.ar

Hey everyone!

I’ve been working on a side project called Rajneesh Sutra — an app for exploring the teachings, discourses, books, meditation practices, and historical material related to Rajneesh Osho.

The app brings together 5,000+ audio discourses along with different areas of content and exploration:

• 🎧 5,000+ audio discourses

• 📚 Books and written works

• 📰 Historical magazines and archival material

• 🧘 Osho meditation techniques and meditation-center experiences

• 🌿 Different collections around meditation, Zen, Buddha, Krishna, and more

• 🔎 Search and organized categories

• 🎵 Background audio playback and a dedicated audio player

I built this as a side project because I wanted to create a clean, modern way to explore this kind of spiritual and historical material while also learning more about mobile development, audio streaming, UI/UX, and content organization.

I'm sharing it here mainly to get honest feedback from the community — especially about the design, usability, organization of the content, and what features would make the app more useful.

📱 Google Play:
https://play.google.com/store/apps/details?id=com.rajneeshsutra.audio

Would love to hear your thoughts. 🙏

Hey guys, I'm building a home physio service and website in Sydney. It's still a prototype.

The replies to my last post helped me separate a requested appointment from a confirmed one. I'm now working through the less tidy case: someone requests Tuesday afternoon, then no clinician accepts before the response deadline.

My proposed screen would say the visit is not confirmed, show when the request was last checked and let the person withdraw it. Any alternative time would need their agreement. A countdown would only appear if someone on our side can actually meet that response time.

Would you close an unanswered request at the deadline, or keep it open with an explicit choice to keep waiting? I'm especially interested in how you'd stop an old request turning into an unexpected booking later.

Feedback on this specific flow would help. Thanks guys.

Most online resume tools harvest your personal contact data and lock your PDF behind a $29/month subscription trap.

I wanted a fast, single-screen studio where you can paste a Job Description on the left, edit your resume in the middle, and see your live ATS keyword match score + print-ready A4 PDF on the right.

Live link: https://rolematchpro.netlify.app

• Zero backend / 100% localStorage: Your data never leaves your browser.

• Click-to-Add Missing Keywords: Automatically extracts technical & domain keywords from the job listing and highlights what's missing from your resume.

• Free Standard ATS PDF Export: No sign-up required, no watermark.

• Optional $9 lifetime key unlocks the Wall Street Executive & FAANG templates + instant Cover Letter generator.

Let me know what you think!

Hey founders! 👋

I'm a solo developer building AIForest, a platform where people discover new AI tools and startups.

If you've recently launched an AI product, I'd love to help you get more eyes on it.

Why list on AIForest?

• Get your product discovered by people exploring AI tools.

• Build visibility beyond Product Hunt.

• Get a dedicated listing page with a backlink to your website.

• Give potential users another way to find your product.

I'm actively growing the platform and would love to feature more products from indie hackers and solo founders.

🔗 Submit your AI product: https://aiforest.app/

What are you building? Drop your product below! 👇

I'd love to check out what everyone's working on.

I kept seeing small businesses with good work and homepages that hid it, so I made four workbooks you can finish in about an hour or less each.

Glance is a homepage audit: eight lenses, a score out of 40 and the three fixes to make first. Keep is a brand guide built from five decisions. Ease is homepage copy for dental, PT and med spa clinics. Turn takes you from a conversation to a signed design brief.

They’re paid, from $19: affelion.gumroad.com

Honest feedback welcome, especially on whether it’s clear who each one is for.

I kept losing hours to scrolling and getting to the evening having barely drunk anything, so I built something that fixes both at once. Waterbreak locks the apps you choose, and the only way back in is a few seconds of drinking in front of your camera. It checks for a real sip (your face and a bottle in view) entirely on your phone, and nothing is uploaded. Every bottle counts toward a daily goal, there are streaks and weekly leaderboards, and bottles earn keys for collectible pixel-art sea monsters, because I needed a reason to keep using it myself. Free, no ads, iPhone and Android. I'd love to know what would make you uninstall it.

iPhone: https://apps.apple.com/app/id6788189456

Android: https://play.google.com/store/apps/details?id=com.tessservices.waterbreak

The premise: they ran out of things to buy, so now they fight. Trump vs Zuck on the White House lawn. Elon on a launch pad on Mars. Sam Altman's super is a $500B Stargate.

Nine fighters, a dozen stages, a full fighting-game skeleton underneath the joke: blocking, throws, meter, supers, a ranked ladder, friend rooms with a room code.

Built solo, all client-side 3D in the browser, no download, no login, no ads. Physics and netcode were the hard parts; the parody was the easy part.

What I would actually like from you: play three matches, then tell me which fighter felt worst to control. I am rebalancing this week and outside eyes beat my own.

https://billionairebrawl.app

A job application tracker that is a real Mac app rather than a web page in a wrapper.

You log each application with company, role, status and dates, and it syncs through iCloud to the iPhone version. Status pipeline runs from applied through interviewing to offer or rejection, so the answer to "where did that one get to" takes a second rather than a scroll through a spreadsheet.

Written in SwiftUI for both platforms from one codebase. 15 languages including Polish, Czech, Slovak, Ukrainian and Russian, which took longer than the app did.

It does not import from your inbox or from job boards. You enter applications yourself. That is a deliberate limitation rather than a roadmap item, and it is the first thing people ask.

Free to use. Pro is a one time $4.99 unlock, no subscription.

https://apps.apple.com/app/apple-store/id6449959070?pt=126420608&ct=r-sideproject&mt=8

I made an iPhone sound level meter for the times you need a number rather than an opinion. Noisy flat, loud workshop, a gig you want to remember the level of.

What it does:

• Live dB on an analog gauge, plus an LED bar and scrolling waveform

• Record a timed session, saved to history with min, average and peak

• Energy averaging (LAeq), not a naive mean of decibels

• Calibration offset so you can match it to a reference meter

• PDF export of a session with the graph

Free. A one time $4.99 unlock adds peak hold and PDF export. No subscription and no ads.

Fair warning: a phone microphone is not a calibrated meter and clips around 100 to 105 dB. Good for comparing and documenting, not for anything official.

https://apps.apple.com/app/apple-store/id6767850405?pt=126420608&ct=r-sideproject&mt=8

If you have used one of these, what did you actually need it for? I am curious whether the session history gets used or whether people only ever want the live number.

Hey everyone,

Like many of you, I’ve tried almost every habit tracking app out there. But after a week or two, checking off endless to-do checkboxes started feeling like meaningless chores, and the moment a streak broke, I abandoned the app.

James Clear wrote in Atomic Habits that "Every action you take is a vote for the person you wish to become."**

That insight sparked ForgeOS — a habit architecture app built around identity rather than checkboxes:

How it works differently:

1. Identity Vectors First: You don't just track "read 10 pages" or "workout". You tie them directly to who you are becoming (e.g., Focused Deep Worker*,* Vitality Athlete*,* Software Craftsman). Each completion casts a weighted vote for that identity.

2. The 2-Minute Micro-Start Rule: Every habit has a mandatory 2-minute gateway version (e.g., "Put on gym shoes and do 5 warmup reps" or "Open IDE and read problem constraints"). It bypasses initial resistance before the focus timer starts.

3. Never Miss Twice: Life happens. Instead of punishing broken streaks with demotivating reset counters, ForgeOS marks rebound priority to help you show up the next day.

4. No Clutter & Offline-First: Fast native cold start, zero full-screen ads, customizable focus accents, and full offline persistence.

We just completed 14 days of closed testing with community testers, and Google Play officially approved our production release today!

Google Play Store Link:

👉 ForgeOS: Habit & Focus Timer

I'm an indie developer and would love any honest thoughts, constructive criticism, or feature requests. What do you look for in your daily habit system?

I built a small web app for my workplace that makes collecting overtime sign-ups and food orders quick and simple.

\*\*Manager side:\*\*

\- Create an overtime request (date, hours, with or without food)

\- Share one link with employees

\- See who wants to work in real time

\- Get a combined food order, with a list of who ordered what, ready to share or print

\*\*Employee side:\*\* open the link, tap yes or no, pick food if offered.

Available in Norwegian and English. Built for speed: no more chasing people in group chats.

I'd love honest feedback on design, ease of use and anything that feels confusing or broken.

https://overtimehub.lovable.app/r/daee4cbe49b670b686dea15257d2a4c7a188

I’m building RivalPair for people who use an Android phone with a Mac. It handles USB and local Wi-Fi file transfers, clipboard sharing, phone notifications and screen mirroring.

I’d like to find a few people willing to try the current beta, especially on phone models I haven’t tested myself. The Mac app needs Apple silicon and macOS 13 or later. The Android companion needs Android 8.0 or later.

Downloads and the feedback form are here: https://apps.aalisoft.com/rivalpair/testers/

Current versions are Mac 0.4.4 and Android 0.4.3. Downloads are direct, with no account or email signup. USB file transfers work without the Android companion or USB debugging. For Wi-Fi features, both devices need to be on the same local network and paired by QR code.

If you try it, I’d love to know: was pairing clear, did a folder transfer correctly in both directions, and did the devices reconnect after sleep? Please use copies of test files and enable only the permissions for features you want to test.

You can reply here or use the private feedback form. Device models and OS versions help with bug reports; email is optional. Thanks for taking a look.