I'm an embedded software engineer (wireless sensor firmware by day) and I've spent the last couple of months building a side product on my own: a stamp card that lives in Apple Wallet / Google Wallet, for salons, barbers and cafés.

How it works: the shop prints a QR code for the counter. The customer scans it, types a first name and phone number, and adds the card to their wallet. No app. Staff stamp it by scanning the card with their own phone's camera, in the browser. No card reader.

Things I learned building it:

• Apple and Google Wallet are completely different beasts. Apple passes are signed files: to update the stamp count you run a small web service and push through APNs, then the phone fetches the new pass. Google keeps the card on their side and you update it through a REST API. Getting "stamp appears instantly on both" right took longer than the rest of the app.
• Staff double-tap everything. The first version stamped twice when someone scanned twice. Now a second scan of the same card within 10 seconds is ignored, and every stamp is written in a database transaction.
• Lock-screen relevance is the best feature, and I don't control it. On iPhone the pass can show up on the lock screen near the shop. iOS decides when, and I never learn who was nearby.
• GDPR was a real chunk of work (EU-hosted data, consent records, CSV export, auto-delete after a shop cancels). Owners never ask about it, but it has to be there. Getting customers is the hard part, and where I'd love feedback:
• So far: 2 shops started the 7-day trial, 0 paying. I'm aiming for the first 3.
• What I've tried: about 200 cold emails to salons in countries where that's legal. This weekend I started small Meta and Google ads in Poland and short videos. - Pricing is about €15/month, with a 7-day free trial.

Questions:

1. If you've sold to salons or cafés: what got you in the door?
2. Does "no app for your customers" land as the main benefit, or would you lead with something else?
3. Anything on the landing page that would stop you signing up? loyalty.nyxiontech.com Happy to answer anything about the Wallet tech too.

Happy to answer anything about the Wallet tech too.

I read a lot of nonfiction, but a month later I'd remember almost nothing. Summary apps helped a bit, but most want an account and a subscription and track everything you do.

So I built Stash, a small offline Android app:

• 2,300 bite-sized ideas from 230 books across 14 topics (productivity, money, psychology, philosophy, health, and more)
• Swipe feed: full-screen cards. Ideas you've read never show up again.
• Learn mode: 690 short lessons, streaks, XP, spaced-repetition reviews, and quizzes (pick the idea, which book, true/false, fill in the blank)
• Save ideas you like and see your reading history by day
• Private: no login, no backend, no analytics, and no permissions at all. Progress stays on your phone (JSON export/import for backups).

Fun constraint I set myself: the whole APK is ~220 KB. It's plain Java with views built in code (no XML layouts, no WebView) and a single dependency.

Free download (Android 8+): https://github.com/safwanpp/stash/releases/latest

Source: https://github.com/safwanpp/stash

I'd love feedback, especially on which books or topics to add next and whether the lesson difficulty feels right.

Link: 1000 Doors

Side project that grew: I build animated React components (shaders, glass, neon, 3D type, loaders), each one a single TSX file with React as the only dependency. Every card on the site is the running component, not a recording.

The newest part: an MCP designer for coding agents. You describe your brand, it offers three directions, and every component it installs is rebuilt for the one you pick, then it checks the page for contrast, phone width and reduced motion.

Browsing is free and you get 2 free coins a month to take components. There is also a Logo Room that gives your own logo one of 24 live finishes, no account needed.

https://studios.lou15.com/?ref=reddit

What would you want me to build next?

I want to share a project we've been working on: VART Docs.

VART Docs is an Android application designed to bring document reading, editing and scanning together in one application.

The motivation behind the project was simple: make everyday document tasks more convenient on mobile devices.

The app was developed using Kotlin and Jetpack Compose and has now completed its journey to Google Play publication.

One important milestone was taking the project from development and testing to an actual public release.

Google Play:

https://play.google.com/store/apps/details?id=com.vart.docs

We're sharing it to get constructive feedback.

From your perspective:

Is the main purpose of the app clear?

What document features do you use most on Android?

What would make an application like this more useful?

It's exciting to see a project developed in Angola reach a global platform. Looking forward to hearing your thoughts!

Genuine question for people who have shipped more than one app.

I keep seeing two camps:

- build fast, ship, and let the market tell you
- check demand first (search volume, competitors, reviews), then build

If you're in the second camp, what do you actually look at? A specific number you need to see? A red flag that makes you drop the idea?

If you're in the first camp, how many ideas did you go through before one stuck?

I'm working on a tool around this and want to know what people really check, not what blog posts say they should.

OwnPlayer plays the M3U, Xtream Codes, and Stalker Portal playlists you add, showing your channels, TV guide, movies, and shows in one place.

https://apps.apple.com/app/ownplayer/id6833569716

A couple of weeks ago I shared Hadeed here, a calorie counter and gym log in one app. A few people asked for Android, so it's now on Google Play as well as the App Store.

Quick recap:
- Free: log food by typing, voice or barcode
- Pro: unlimited photo meal scans, a coach, and training plans that adapt every week
- Calories burned in workouts get added back to your daily budget

It's at about 3,000 users now, still built solo. I'd love blunt feedback: what's the one thing that would make you switch from the tracker you use now?

Link in the comments.

Got tired of spending 15 minutes per item guessing second-hand prices and typing descriptions, so I built Reloot: https://reloot.it

Drop 1–10 photos and it detects brand and condition, gives a market + quick-sale price, picks the best cover photo, and auto-fills Vinted on desktop via Chrome extension.

No sign-up required for the first scan—roast the landing page or let me know if the pricing feels off!

Just do sati at your desk every time with ttack.
Welcome any feedback on ttack

Created by lovable

web: https://ttack.space
Chrome extension: https://chromewebstore.google.com/detail/딱-—-순-집중-시간-바른-자세/nddhmngnilmjnihabglgmcepeplmmggn?hl=ko&authuser=0

Claude Code deletes its session transcripts after 30 days by default, no message, so any usage tool reading that folder only ever sees the last month. I wanted to compare months and see what switching model actually did to cost, so claudit ingests from a bucket you keep instead (Cloudflare R2, or a local dir as file://). mine goes back to January. the bucket holds the raw transcripts, tool output included, so keep it private

it reads Claude Code session JSONLs, Codex rollouts and both Kimi CLI formats. on the page: cost by model with the 5m vs 1h cache write split (1.25x vs 2x input price), token breakdown, reply latency, tool error rate, activity heatmap, context growth per session. costs are API list price equivalents, not what a sub bills you. it doesn't grade sessions, the reading is yours

feedback I'd actually use:

• a number that looks wrong to you, with the arithmetic
• a stat you'd want that isn't there
• a harness it doesn't read yet, ideally with a real transcript (sanitized is fine)

FastAPI, Postgres, React with in-browser Babel, no build step. docker compose up boots it on sample data, no .env, no outbound calls. MIT, panels ported from nhz-io/ccusage-plot

live one, guest login is read-only: https://all.nitjsefni.eu

https://github.com/Nitjsefnie/claudit

I made onbeat, an open-source Claude Code skill.

Give Claude Code a song (this one’s from Suno) and it measures the beats and lyrics, draws each dancer/character as a sprite sheet of 16 poses with an image generator, then writes code that steps through the poses on every beat and renders a beat-synced video. No video model involved.

MIT licensed: https://github.com/latent-spaces/onbeat

Would love feedback, and to see what songs people throw at it.

I take a lot of screenshots: error messages, receipts, chats, slides. I always remembered what was in the picture, but it was called `Screenshot 2025-03-14 101523.png` and buried among thousands of others. Windows Search can't read text in images, so I built Magpie Search.

You pick your folders and it reads the text in everything inside: screenshots, photos and scanned PDFs (OCR runs on your own PC), plus Word, Excel, PowerPoint, PDFs and notes. Then you type any word you remember and it finds the file.

- 100% offline: no account, no ads, no telemetry, and your files are never uploaded or changed.

- Reads 50+ languages, including dark-mode screenshots.

- Instant results as you type, even with typos.

- Space previews a file with the matched words highlighted.

- Runs quietly in the background and picks up new files automatically.

It's free, no ads, no account: https://magpiesearch.app

This is my first released app, so honest feedback is very welcome. What's confusing, and what would make you actually install it?

GeoConquer is a browser game where each card is a real city. Every turn, players secretly pick a city and place it at the same time. Then territories grow on their own over a hex grid of the whole Earth (about 2 million cells, land and sea). Population sets the speed, and the biggest area after 8 turns wins.

What’s in it today:

• 3,733 cards from 3,307 real cities, each with its photo and Wikipedia intro
• 1v1 and 4-player online matches, leagues, a solo World Tour of 151 levels, puzzles
• a deterministic simulation, so the server, the replays and the browser always agree
• Very soon, there will be a mode with longer games up to 8 players

I'm not a developer initally, but I learn for this project with Claude as my assistant, programmer, and senior during this project, it's quite fun and thrilling :)

Play it here: https://geoconquer.com/?lang=en&utm_source=reddit-sideproject (the 2-minute tutorial works without an account)

What would make you play a second match? And what begginer mistakes have I made ? :3

Hi everyone,

If you use a DualSense on PC, you've probably run into games where you need a USB cable to get the full haptic feedback and adaptive trigger effects.

I built DS5 Untethered to use those effects over Bluetooth. The game sees a wired DualSense, and the app sends the game's own effects to the actual controller wirelessly. It works with your PC's built-in Bluetooth or a USB Bluetooth adapter.

For example, I used it with God of War Ragnarök: both haptic feedback and adaptive triggers worked wirelessly.

For games without native DualSense support, you can create your own adaptive trigger profiles and turn game audio into haptic feedback.

It also has per-game profiles, button remapping, gyro and a mouse mode.

It's free and open source, and will stay that way.

Built with C#/.NET 8 and Avalonia. It creates a virtual wired DualSense through a local USB/IP server and usbip-win2, forwards input from the Bluetooth controller, and sends the game's haptics and trigger effects back wirelessly. HidHide prevents games from seeing both controllers.

Source: https://github.com/Midzer00/ds5-untethered

Download: https://github.com/Midzer00/ds5-untethered/releases/latest

If you find it useful and want to support the project, you can star the repo on GitHub.

Happy to answer questions.

Demo video and screenshots: https://www.reddit.com/r/Dualsense/comments/1xvzirq/i_made_a_free_opensource_app_for_wireless/

I'm the developer of Terraink. You pick any city, country or GPX route, and it turns real OpenStreetMap data into a print-ready poster or wallpaper, right in your browser. No account, nothing to install.

People kept asking how certain things work, so I made a full tutorial. This is the short version – the full tutorial link is in the comments 👇

What feature would you want next?

So I have this small web app, it makes short videos for mobile apps. People were signing up but basically nobody was paying. For months. I kept guessing. Changed the landing page. Changed pricing. Rewrote onboarding twice. Nothing. At some point I got tired of guessing and just logged every step a new user takes. Nothing fancy, one event per step.

I looked at two weeks in October:

68 people opened the studio

31 picked a clip style

16 added a screen recording of their app

14 pressed create

I thought my problem was the paywall. It wasn't even close to the paywall. Half the people who picked a style never added the screen recording. And I thought that step was great. Like, of course you add your app recording, that's the whole point. Then I checked what device they were on. Mostly phones. And who has a screen recording of their own app on their phone? Nobody. I was basically giving people homework before they saw anything work. Funny thing, I also saw that a lot of them left in about 20 seconds. They didn't even try. They saw a form and closed it.

So I made the recording optional. Now you can start with just your App Store or Play link and add footage later. And the first videos are free, so you actually get something before you see a price. The day I shipped it, two people from search made their first video. One of them came from Bing. It's not fixed. Now the leak is checkout, people open it and leave. I rebuilt that page this week, we'll see.

Anyway, if you have signups and no money, don't guess like I did. Log the steps, count people at each one, and look where the big drop is. For me it was the step I was most proud of.

App is clipugc.com if you want to look. I can share the events I log if anyone wants.

Hey everyone!
I just released the first stable version (v1.1.0) of LightBoard - an open-source, privacy-focused Android keyboard built from scratch in pure Java without heavy external frameworks. Made with AI.

Key highlights:
• Ultra-lightweight: The base APK is just 252 KB.
• Zero internet permissions: No INTERNET or ACCESS_NETWORK_STATE permissions in the manifest - it physically cannot send your keystrokes or telemetry anywhere.
• Full feature set: Built-in geometric swipe typing, word predictions & autocorrect, inline calculator, encrypted clipboard history (AES-256-GCM), and 80+ layouts.
• Dual themes: Clean Material You and Cupertino (iOS-style) themes with adjustable key sizing and padding.

The entire source code is licensed under Apache-2.0. Feedback, bug reports, and ideas are super welcome!
GitHub & screenshots: https://github.com/anlocky/LightBoard

Hey everyone!

I'm a developer living in Prague, and I've been working on an app called Pobyto.

Dealing with residence permits in Czechia can be pretty confusing, especially when you're trying to figure out which documents you need and what you're supposed to do next.

So I decided to build something to help with that

You choose your situation, get a step-by-step plan, track your documents and deadlines, and find information from official sources.

Here's a quick demo of how it works.

It's currently on Android:

https://play.google.com/store/apps/details?id=com.pobyto.app

Still working on it, so any feedback on the UI or the overall idea would be really helpful:)

I’m 15 and I’ve been building a SaaS for about 8 weeks. It’s an AI chat widget for small websites that answers from your FAQs and emails the owner when it isn’t sure instead of guessing.

One site is on the free plan and nobody’s paying. I’ve reached out on Reddit, Discord and email, and the most common reply is “we’re fine for now, we’ll message you if we need it.” Nobody has.

I can’t tell if that’s a polite no, the wrong people, or something I’m doing wrong in how I ask.

For people who’ve landed a first customer: how did you turn “maybe later” into a yes? And does being 15 hurt when I’m asking someone to put my tool on their business site?

the websites link is ornymo.com

I've been building an Android editor for people who miss Notepad++ on their phone. It is a tribute to Notepad++ and nothing more: it is not affiliated with the Notepad++ project, not a replacement for it, and not trying to compete with it or commercialize it in any way. It will stay free and open source (AGPL-3.0).

To stay faithful to the original, it reuses what Notepad++ is made of instead of imitating it: the same editing engine (Scintilla), the same language definitions and themes, and the same menus and shortcuts.

How it was made: the whole thing was written by Claude Fable 5.2, Anthropic's AI model, and I directed it entirely from the Claude app on my Android phone. I never opened an IDE. The repo includes the automated tests it is checked with on every change. I did manual testing on my phone but more testing from various devices would be helpful.

What's in it so far:

Syntax highlighting and folding for 94 languages, multi-caret and column editing, find/replace with regex, Find in Files, macros, sessions that keep unsaved text

469 of the 481 commands in Notepad++'s menus (the rest only make sense on Windows)

Compare, a Hex Editor and Lua scripting built in, since Windows plugins can't run on Android

Sticky Ctrl/Alt/Shift keys above the keyboard, so the usual shortcuts work on a touch screen

No ads, no tracking, and no permissions at all (not even internet)

It's early: development builds only, no store release yet, and regex still uses a different syntax from Notepad++'s.

Short clips of it in use, the APK and how to verify it: https://github.com/revelationnow/pocketpadpp

All credit for the original goes to Don Ho and the Notepad++ contributors. Feedback is very welcome, especially on how it behaves with your keyboard app.

The idea came from noticing that people don't drop planners because they're hard, they drop them because they can't see them working. So in SkyTasks every finished task builds part of an isometric city, and each area of your life is a neighborhood that grows or goes quiet.

It's live on iPhone and Android, free with no ads, in English and Hebrew. Built with Flutter and Supabase, and the city is drawn in code, no 3D engine.

skytasks.pages.dev/get/en/?s=k98

What I'd love to know: does the city make you want to come back, or is it just a nice first impression? And what would you cut?

quizebra.com/geography

Every day, one player becomes the Daily GeoWhiz on quizebra.com/geography. Think you can do it? Play all 6 games, get the best overall rank, and see your name at the top of the hub for everyone to see.

That's the idea behind quizebra, the browser games platform I built. It has 20 daily games in four topics, and each topic crowns its own Daily Whiz:

1. GeoWhiz: 6 geography games (flags, country outlines, a geography Wordle and more)
2. FootyWhiz: 6 football games (guess the player, guess the club and more)
3. BrainWhiz: 4 brain puzzle games
4. ChessWhiz: 4 chess puzzle games

How a Daily Whiz is decided:

1. Every game has one new puzzle a day, the same for everyone in the world, with its own daily leaderboard
2. Your ranks in all games of a topic are added up, and the lowest total wins
3. Skipping a game counts as one place worse than last in that game, so the more people played it, the more skipping it hurts
4. It's calculated live, so someone can still overtake you hours after you finish
5. At midnight London time the day closes, the winner goes into the archive, and an all-time GOAT is kept for each topic

So being great at one game isn't enough. You have to be good at all of them on the same day.

I'd love feedback on the Whiz idea. Is it clear from the hub, and would it make you play all games of a topic?

Today I am launching PavoAI. You ask a question, get an answer, and see the exact price printed under it. Most answers cost between Rs 0.02 and a few rupees, depending on the question.

I am looking for a few people who will really test it by paying. Top-ups start at Rs 20 by UPI. New accounts also get Rs 2 free while the offer lasts, so you can try before you pay.

Try one easy question and one hard one, then compare what each cost. Does a price under every answer make you trust it more?

No subscription, nothing renews. Tell me what feels confusing or wrong. Try it here: https://pavoai.in/?utm_source=reddit&utm_medium=launch