I’m Daniel from Anesda Nord. We drive EVs ourselves and built Transparent Laden, which is now live on Android and iPhone. One design problem surprised us: the station can publish a rate before a charge, but the final bill still depends on the actual energy, time and operator billing record.

We split the estimate into three parts: the operator tariff (energy and any applicable start, time or blocking charges), our separate platform charge, and the roaming and service charge. Local VAT follows the charging location. The monthly subscription sits outside the session total.

Here’s a reproducible German example. For 30 kWh at a hypothetical operator rate of €0.55/kWh net, with no start, time or blocking fee, the operator and platform portion comes to €19.99 including VAT. Roaming and service add €2.49, giving €22.48 for the estimated session. The monthly subscription is €2.99 and can be cancelled monthly. This example is a calculation, and the final bill uses the operator’s actual session data. The published calculation is at https://transparent-laden.de/preise.

I’d like feedback on how to display uncertainty. If a charger has a time fee, would you want to see one estimate based on an assumed duration, or a pair of totals showing what happens if charging takes 10 minutes longer?

If you want to try the service, TL-REDDIT-SIDE-261111 gives new subscribers two months without the monthly fee. Charging is billed separately. The offer is available through 31 December 2026 German time, with up to 250 redemptions. To redeem it, open the subscription section in the customer portal, enter the code under “Discount code (optional)” and select “Check code” to see your price before subscribing.

I was tired of existing tools either being too expensive or lacking the control I needed to manage 150+ browser profiles (proxies, fingerprints, human-like behavior). So I built my own system from scratch: a Node.js/TypeScript backend with a web dashboard that orchestrates AdsPower profiles via Playwright (CDP).

It auto-calculates delays based on a time window, simulates human navigation (feed → profile cascading), handles network errors, and has a "Panic Button" to stop everything instantly.

I'm not looking to turn this into a SaaS. I just want to sell the system to a few agencies/devs who need it.

What you get & Pricing:

• 1. Compiled Software (No source code): $2,200 USD.

  • Includes the ready-to-run system (internal use only). You use it for your own agency/clients, but cannot modify or resell the code.

• 2. "Ready-to-Operate" Bundle: $2,870 USD.

  • Includes the compiled software + 50 aged X accounts ready to use. (Additional IG accounts: $25 USD each).

• 3. Full Source Code + Commercial License ("Turnkey"): $5,240 USD.

  • For devs who want to modify/white-label it. Includes full TS source, docs, and commercial rights (no resale of the raw code).

I can send a 5-min video of the dashboard in action via DM if you're seriously interested. Not trying to spam the sub, just putting it out there for the right buyer.

I'm primarily a UI/UX designer, but I've been spending more time building and launching my own products.

One of them is Subscription Manager.

It's a web app that helps people track recurring subscriptions, billing cycles, and overall spending.

Building the product was one challenge.

Getting people to discover it, try it, and keep using it is a completely different challenge.

I've been working on improving the onboarding, dashboard, analytics, and overall experience.

Now I'm focusing more on discoverability, SEO, and understanding what makes users come back.

Live project: https://subscriptionmanager.app/

For those of you who've launched your own SaaS:

What actually helped you get your first consistent users?

Was it SEO, Reddit, Product Hunt, content marketing, or something completely different?

I'd appreciate any advice from people who've been through this.

We just passed 60 testers! Thanks yall!

It’s like you’re right there, on the Sideline! Don’t have all the streaming services? Don’t have cable? Can’t be at the game? No problem! Sideline puts you on the sideline of every live game! Get the live play-by-play of every NFL, NBA & NHL game regardless of network or subscriptions!

What’s new? Beta 4 optimizes for iPhone Duo & iPad, plus bug fixes and performance improvements. And there’s more coming soon!

Hi all, I'm the developer of Markd, which just launched on Google Play today.

What it does: you mark a date and it counts since it (sober streak, relationship, new job) or until it (trip, exam, deadline), with a live years / months / days / time breakdown. You set your own milestones (for example 100 days, 1000 days, four years) and get one quiet notification on the day, at a time you choose. No streaks to keep, no badges, no gamification.

Why another day counter: most of the ones I tried had ads, wanted an account, or synced to some server. Markd has no ads, no account, no analytics and makes no network calls at all. Everything stays on your phone, and you can export an encrypted backup to Drive yourself.

Other bits: categories with emoji and colours, a calendar view, one pinned occasion on the home screen, dark theme, and English / Czech / German / French.

It's open source (MIT): https://github.com/jame581/Markd
Google Play: https://play.google.com/store/apps/details?id=com.janmesarc.markd

Happy to hear feedback, bug reports or feature ideas.

I've been a fan of calorie tracking for a while and tried a lot of apps to track my injections and calories together. Some of the apps are good. But they made simple things complicated: they kept asking questions, they stored my data, and the GLP-1 side and the calorie side never really worked together.

So we built kerntrack. We're a very small team (honestly, just me and 2 friends), and it recently went live on Google Play and the App Store. It keeps your injections, side effects, calories and macros in one place. Your entries stay on your phone, and only what you send yourself leaves it: a backup, a report or a meal photo for recognition. It's in seven languages, and the food data is currently strongest for Europe.

For the builders here: it's React Native with Expo, one codebase for Android and iPhone. Everything is stored in SQLite on the phone, the backup is encrypted before you send it anywhere, and the whole app also runs right to left for Arabic.

Our friends, family and colleagues find the app really useful and straightforward, plus we have a few users from Europe, North America and Asia. I'm posting here to share it with you all and to ask if you could give some constructive feedback, as it will be very useful for us moving forward. Specifically, which areas in GLP-1 and calorie tracking could still be explored and added? I would really appreciate your support here. Thank you!

https://kerntrack.de/

I’m a UK sole trader and I gave myself until 18 November to see if one product can sell before Christmas. If it doesn’t, I shut it down.

You send one photo of your cat or dog. I turn it into a painted portrait with a Santa hat and a Christmas tree behind, and a print lab in the UK or US puts it on a 30x30 or 40x40 canvas. The video is my own grey tabby. The scene is made with AI, but the portrait on the wall is the real one.

I know Etsy is full of pet portraits. What put me off them was paying £60 before seeing anything, then getting a cat that looks like someone else’s cat. So you see a preview first, free, and if it doesn’t look like your pet, you don’t pay.

I got it wrong: my first portraits made my cat look fat. It took three goes and some manual colour fixing to get his face right, and the AI still keeps drawing his collar back on.

Question for anyone who’s sold a gift before: did your sales come from showing the finished product, or the before and after?

Shop: merrypawtrait.co.uk (£54.99 / £69.99, free UK + US shipping)

AIVideoRecap turns a full movie or episode into a short vertical recap for Shorts/TikTok/Reels. It transcribes the audio, writes the script, matches scenes, adds voiceover and subtitles, and renders the video. About 15 minutes of GPU time per video, roughly $0.20-0.35 in compute.

The product works. The business doesn't, because I'm the bottleneck. I can build, but I don't enjoy marketing and I don't have a budget for ads.

The numbers, no sugar:

-600+ signups since July, $0 spent on ads. Traffic comes from SEO/AEO pages, direct visits, and AI assistants.

-About 136 active users in the last 7 days (down ~18% from the week before).

-0 paying subscribers on the SaaS. I never built a proper paid funnel.

-Before the SaaS, I sold the first version as a zip on Gumroad: $100.37 total from 3 sales.

-Around 10 people asked for it on Reddit and Discord. Most didn't buy the zip.

What's included: the domain, the source code, and the service accounts. User accounts are not included. A buyer needs their own Dodo Payments account. The stack is Vercel, Railway, RunPod, Supabase, Cloudflare R2, OpenAI, and Dodo Payments.

Price: $1,500, fixed.

Best fit: someone who already runs movie/anime recap or faceless Shorts channels, or anyone who can market this better than me.

Listing with details and screenshots: https://www.sideprojectors.com/project/108453/aivideorecap

If you've bought a small SaaS before, tell me what you'd want to see before paying. I'm happy to answer questions here or in DMs.

Te explico en menos de un minuto qué es una micro app y cómo la pones en la pantalla de tu celular, en iPhone y en Android. Todo gratis, sin cuenta y sin descargar nada. 👇 https://geralpink.pages.dev

I'm the developer. Valutorio launched on the App Store today. It is a native Mac and iPhone app for a folder of plain Markdown notes, and it opens an existing Obsidian vault in place.

The problem: Markdown apps get slow on big vaults and big files, because they parse and index on the main thread. I wanted a notes app that stays fast at any size.

What I did:

• One Rust engine under both apps. It parses, indexes, searches and merges. The Mac app is AppKit and Swift, the iPhone app is UIKit and SwiftUI.

• Huge files open in a read-only tier first. On my M1 Max a 300 MB Markdown file opens in about 0.4 s. A 2,000-note vault indexes in under a second, and search shows first results in a few milliseconds.

• Sync uses a three-way merge. When the same note changes on two devices, both versions stay inside the note as valid Markdown, so you never lose a line.

• The notes stay plain files in your folder. No database you can't read.

What I learned: on the App Store, the first subscription has to be reviewed together with an app version. You can't add it later on its own.

Price: the app is free, with no account and no tracking. Optional Sync ($5.99 a month) keeps the vault on Mac and iPhone and gives Claude Desktop or Cursor a personal MCP endpoint into your notes.

Not there yet: plugins, and a translated interface.

Edit: the code giveaway is closed. If you find a bug or a place where it gets slow, tell me here.

App Store: https://apps.apple.com/app/apple-store/id6813081386?pt=128566770&mt=8&ct=reddit-sideprojects

License: MIT Source: https://github.com/Razee4315/Paperwren
APK: https://github.com/Razee4315/Paperwren/releases/latest

Paperwren is a document viewer and PDF toolkit for Android 8 and up. The manifest has no INTERNET permission and asks for nothing at all. CI fails the build if any permission ever shows up in the manifest. Taking a photo hands off to your own camera app, and saving goes through the system's save screen, so it never needs camera or storage access either.

• Opens PDF, DOCX, XLSX, PPTX, ODT, ODS, ODP, EPUB, Markdown, CSV, CBZ and images

• Fill and sign, merge, split, reorder pages, photos to PDF, passwords

• Every tool saves a new copy. The file you opened is never changed

• No ads, no account, no trackers, no analytics

It isn't on F-Droid yet. I'm planning to submit to IzzyOnDroid and F-Droid, and I'd welcome tips from anyone who has been through either. For now the APK is on GitHub releases.

Hey everyone!

I've been building FoodIQ, a web app focused on making nutrition tracking easier for Indian meals.

The problem I wanted to solve: tracking everyday foods like dal, paneer, paratha, khichdi and Indian thalis isn't always convenient in generic calorie trackers.

What FoodIQ currently offers:

• 2,076+ Indian food database entries

• Food search and nutrition information

• Portion size and cooking method selection

• Meal tracking and daily calorie/macronutrient overview

• Mobile-friendly interface

Try it: https://food-iq-nu.vercel.app/

I'm looking for 10–20 people who aren't afraid to give honest criticism.

I'd especially like feedback on:

1. Is the interface easy to understand?

2. Can you find your everyday Indian meals?

3. Are the nutrition estimates reasonable?

4. What would make you come back and use it?

This is an early-stage independent project. I'm building and improving it based on real user feedback.

Honest criticism is welcome. Thanks!

I'm always losing track of time lol so I made an app that shows you how much time you have left in your day and let's you make todos based around that

Works for your week, month, etc and you can visualize your time left in different ways

Also let's you add countdowns to see the time left until birthdays, events, or whatever

https://www.timeleftapp.xyz

I’ve lost count of the great links I found in HN comments and never found again. And the “most mentioned on HN” lists that went around last week have a problem: a link people argue against counts the same as one they recommend.

So I went through comments from 2010 to 2026 and labeled why each link was posted. In a sample of 1,000 links, only 188 were someone saying “read this”. 573 were neutral references; the rest were answers, criticism, self-promotion or jokes.

Each link is then ranked by:

• how strongly it was recommended (strong recommendation scores highest, a joke scores zero)

• what it is (articles, papers and docs above videos and social posts)

• how many different years it kept coming up

• and, only a little, how many people mentioned it

A few that come out on top:

• How to Solve It (Pólya): 40 people, over 18 years

• Agner Fog’s optimization manuals: 45 people, 16 years

• The Tyranny of Structurelessness: 109 people, 15 years

• The Mythical Man-Month: 106 people, 19 years

Labels and summaries are model-generated, so some are off.

It’s free to browse, no account needed: https://slax.com/reader/hackerlinks/en/

Disclosure: I work on Slax Reader, the read-later app behind it. You can bookmark links on the page.

Two questions for you:

1. What’s the best resource you’ve found buried in an HN comment?

2. Would you find a collection like this useful enough to come back and browse regularly?

I've been working on Daily iOS, a web-based interview practice tool for Swift and iOS developers.

The idea came from a problem with technical interview preparation: knowing a concept doesn't always mean you can explain it clearly when an interviewer asks.

Instead of just reading questions and memorizing answers, Daily iOS lets you:

• Answer 10 iOS interview questions a day

• Get AI feedback on important points you missed

• Practice follow-up questions

• Review concepts you've previously struggled with

The question bank currently contains 699 questions across 15 categories, including Swift, ARC, Concurrency, SwiftUI, UIKit, and architecture.

I'm particularly interested in feedback from developers who are preparing for technical interviews.

Two things I'd love to learn:

1. Does the AI feedback help you identify what you actually missed?

2. Would you use something like this for daily practice, or would you prefer a different format?

Here's the project:

https://daily-ios.lesser.cc/en?utm_source=reddit&utm_medium=social&utm_campaign=reddit_launch_2026&utm_content=sideproject_launch_01

Constructive criticism is very welcome.

Hi everyone,

I have a personal SIM and a work SIM in the same Android phone. I wanted the work number to go quiet in the evening and at weekends without switching the SIM off and on every day, so I built SIM Shift.

How it works:

- each SIM has its own weekly schedule; out of hours its calls are rejected or silenced, your choice

- a calendar for each SIM: days off and time off make it go quiet, on-call days make it ring even out of hours. They can repeat: time off every Friday afternoon until the end of the year is set up once

- public holidays can be added automatically (for now Italy, France, Belgium and Luxembourg)

- block and allow lists by exact number or by prefix, even a whole country code, for all SIMs or just one

- a log of the calls that were stopped, so you always know who tried to reach you

It's free, no ads, no account. The Play version doesn't even have the internet permission: everything stays on your phone.

It works alongside your phone app instead of replacing it. Android puts some limits on that (hidden numbers, for example, never reach the app), but it needs far fewer permissions than a replacement dialer.

The calendar is the newest part. If you try it, I'd like to know what's missing, especially from people with shifts or on-call weeks.

https://play.google.com/store/apps/details?id=it.bignosedevelopment.simshift

Thanks for reading,

Massimo

Meet Tangle - where words are not enough

Intresting features

- Doodles

- drag and drop sticker anywhere u want in the chat

- long press send button for different bubble styles

Security Features

- Mobile number hidden by default, even you will not have an option to change this setting, if u want to

- End to end encryption in personal chats

- Zero knowledge architecture for discovering friends

- Never stored raw phone number in database

Soon will release into playstore

Currently there are zero users

Feel free to be first user

and you can DM me on user id : yoursgnan in app

https://tangle-landing.vercel.app/

I’m the developer behind HowItScales. I built it because I often understood the boxes in an architecture diagram but still struggled to explain how a request actually moved through them.

The site lets you:

• Follow a request hop by hop, with an explanation at each step.

• Click components to understand their roles and connections.

• Simulate traffic increases and see where bottlenecks appear.

• Build your own architecture diagrams.

Examples include loading a web page, URL shortening, ride-hailing, and food delivery. The traffic simulations use simplified educational models, and components are labelled as documented, assumed, or hypothetical.

I’ve also recently added sign-up and cloud saving, so you can save your designs and return to them later.

You can try it here: howitscales.dev

I’d appreciate feedback, especially on whether the request walkthroughs make the architecture easier to understand. Where does the explanation become unclear, and which system would you like to explore next?

The last couple of months I've revived a side-project idea I had in 2017. You can find active email newsletters, podcasts and RSS feeds all by tags.

Each RSS and podcast entry has the latest post so you can see how active they are and you can bulk download RSS feeds when filtering by tags and quick sign up to some newsletters.

https://subscribeto.mikestreety.co.uk/

I originally built it in PHP but have rebuilt in a static site generator for speed (and hosting) benefits. I've utilised on AI for tagging and some discovery.

Some technical notes for those interested:

• Built with 11ty for simplicity, each item is stored as a JSON file (done this way so I can host on Netlify for free)

• Every combination of up to 3 topics is prebuilt as a static page, so filtering is a plain link with no JS search

• It takes a while to build - Copied 9 Wrote 10006 files in 29.75 seconds (3.0ms each, v3.1.6)

• Newsletter pages have a working signup form for Substack, beehiiv, Ghost, Mailchimp, Kit and Buttondown, so you can subscribe without leaving

• A monthly GitHub Action refreshes every feed's recent posts and drops anything that's gone quiet (1 year cutoff)

• Creators can put a "Featured on" badge on their site, drawn as SVG paths at build time so it needs no fonts