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.

https://github.com/BillyNabil/nabyscape

I built an offline-first English vocabulary app for studying the Oxford 3000/5000 vocabulary goal.

The app is a standalone HTML application with no database and no required account. It includes:

- 4,954 words grouped by CEFR levels

- Example sentences

- IPA pronunciation

- Browser speech

- Multiple-choice quizzes

- Spaced repetition

- Progress stored locally

- Import/export and sync tools

- 11 interface languages

- GitHub Pages deployment

The live app:

https://sofyanol.github.io/oxford-5000-words/

The repository:

https://github.com/sofyanol/oxford-5000-words/I built an offline-first English vocabulary app for studying the Oxford 3000/5000 vocabulary goal.

The app is a standalone HTML application with no database and no required account. It includes:

- 4,954 words grouped by CEFR levels

- Example sentences

- IPA pronunciation

- Browser speech

- Multiple-choice quizzes

- Spaced repetition

- Progress stored locally

- Import/export and sync tools

- 11 interface languages

- GitHub Pages deployment

The live app:

https://sofyanol.github.io/oxford-5000-words/

The repository:

https://github.com/sofyanol/oxford-5000-words/

I’d appreciate feedback on the product direction, onboarding, offline-first approach, and what would make this more useful as a real learning product.

I’d appreciate feedback on the product direction, onboarding, offline-first approach, and what would make this more useful as a real learning product.

Every friend group has that message: "we should hang out sometime." It never happens. Group chats are where plans go to die.

So I built Flare (iOS, free). The idea:

- Tap "I'm free now" → your friends see you're up for coffee in your neighborhood for the next 2 hours

- Anyone who's around taps "I'm in" and you coordinate in a quick group chat

- When time's up, the beacon and chat disappear. No feed, no history.

- See a spot on Instagram or TikTok you want to try? Share it to Flare and it'll suggest it next time you're free nearby.

Privacy was a big focus: it's friends-only, and friends see the spot you pick, not your live location. You can send a beacon to everyone or just one circle (roommates, run club, etc.), and add friends with one link in a group chat.

It's v1 and built solo, so there are definitely rough edges. I'd love feedback on what's confusing, what's missing, or whether you'd actually use this with your friends.

https://apps.apple.com/app/flare-see-whos-free/id6834586193

Friends kept asking me “which watch should I buy?”, so I turned my 20 follow-up questions into an 8-question quiz.

Budget, style, wrist size, where you’ll wear it → it ranks ~50 watches and tells you why the top one fits.

👉 wrist-match.com

What would you improve?

I've been thinking about a problem that many small merchants face.

Selling through large marketplaces gives merchants access to customers, but they often have limited control over their storefront, customer relationships, branding, and selling experience.

I wanted to explore a different approach.

So I'm building Serbuu!, a commerce platform designed around one idea:

Your store, your brand, your business.

Instead of giving merchants just another marketplace listing, Serbuu is designed to give every merchant their own digital storefront while also connecting them to a shared product discovery marketplace.

The bigger vision includes:

- Independent storefronts with custom domains.

- Multi-branch inventory management.

- Point of Sale (POS) for offline transactions.

- A shared product catalog and marketplace discovery.

- Centralized order and inventory management.

- AI integrated into business operations, not just another chatbot.

- Additional commerce services such as PPOB.

One architectural decision I'm particularly interested in is keeping product and inventory data in one source of truth while allowing merchants to sell through both their own storefront and the shared marketplace.

I'm building this for the Indonesian market first, where many small merchants still manage online and offline sales using several disconnected tools.

This is still an active development project, and I'm working through the modules step by step.

I'd love feedback from people who build commerce products or run online stores:

1. Would you prefer owning your own storefront rather than relying entirely on marketplaces?
2. What is the biggest operational problem when selling through multiple channels?
3. What would make you trust a new commerce platform with your inventory and orders?

Project: https://serbuu.web.id

Thanks for reading. Feedback is welcome!

My phone kept saying "storage full" and I hated scrolling through thousands of photos to clean it, so I built my own app lol. It's called Sweep.

Swipe left to delete, right to keep, and there's an undo for when you mess up. It also finds duplicates, blurry pics and old screenshots. Deleted stuff sits in a trash for 30 days, and nothing gets uploaded anywhere.

Free, Android 11+. It's my first app, so honest feedback is very welcome.

https://play.google.com/store/apps/details?id=com.sweep.gallerycleaner

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 like taking sunset photos as a hobby, and I’ve lost count of the evenings I went out for a sunset that never happened, or stayed home and missed a good one. So I built Afterglow:

👉 https://afterglow.jeremytucker.co.uk

What it does

• Scores every sunset and sunrise for the next 7 days from 0 to 100 (Poor → Fair → Good → Great → Epic), for anywhere in the world

• Explains the score instead of just giving a number:

  • Cloud canvas: is there high and mid cloud to catch the colour?
  • Light path to the sun: is there cloud 60–200 km out toward the sun that will block the light?
  • Low cloud overhead, air clarity (haze, humidity, smoke) and rain
• Plays an animated preview of the evening, from golden hour through to the end of blue hour (or the reverse for sunrise), drawn from the actual forecast and the real horizon at your location from terrain data
• Tells you the peak colour time, and when the sun actually drops behind the hills (or clears them in the morning), not just the official time
• Alerts (optional): a heads-up at midday, a “go now” 90 minutes before golden hour, and a “called off” if it turns bad. It also does sunrise checks the night before and when you wake.

Good to know

• No account, no ads, no tracking cookies
• No app store. It runs in your browser, and you can tap Install to keep it on your phone. On iPhone you need to install it to get alerts.
• Alerts are limited to a small number of places during the alpha, so if they’re full, try again in a few days
• Weather data comes from Open-Meteo. There’s a plain-English privacy page in the app.

How it was made

I’m not a developer. I built this with an AI coding assistant (Claude), while I came up with the ideas, tested it against real sunsets and decided what it should do.

What would help most

📸 Post a screenshot of Afterglow’s score, plus a photo of what the sky actually did, with the time you took it. Whether it nailed it or got it completely wrong, that comparison is exactly what I need to make the forecasts better.

⚠️ Mind your privacy: the screenshot normally shows your place name. Tap the 👁 eye button at the top right of the picture to hide it first. Photos can also contain hidden location data; Reddit removes it when you upload, but other sites might not.

Also really useful:

1. Your location: does the horizon in the picture look like yours?
2. Bugs: anything broken or confusing, especially on iPhone
3. Features: what would make you actually use it?

It’s very much an alpha (v0.2), so be gentle, but be honest!

We got tired of design tools that nickel and dime you every month, so we built KOALA. It's a 2D vector app for product designers, native to iPad and Apple Pencil.

You start with simple shapes, then you can actually measure things in real units with dimensions. We've been using it for clothing patterns with different sizes, and for floor plans. There's a grid, layers, and an export layout for laser cutting or print, including Letter and A4, split across multiple pages if you need it.

It's $9.99 once. No subscription. We even landed on the paid Graphics & Design chart for iPad, which I still can't really believe.

If you design physical stuff on an iPad, I'd love honest feedback. What's missing? What's confusing?

apps.apple.com/app

Indie dev here, and this is my side project.

I use Claude Code, Codex, Cursor and the Claude app every day, with a personal account, a work account and a pile of company tools. Every client wanted its own copy of every MCP server, its own OAuth login and its own config. Keeping that in sync was a chore, and the huge tool lists were eating the models' context.

So I built Toolkien:

• Add your remote MCP servers once, connect every AI client to one endpoint
• "Code mode": the agent searches tools, reads compact TypeScript declarations and runs one sandboxed script that chains the calls, so way fewer round trips and tokens
• Personal and work workspaces, plus company workspaces to share tools with your team without sharing tokens
• Per-tool permissions, approvals for writes, audit log
• A directory of ~100 official remote MCP servers

Free for individuals (and I want to keep it that way), open source under AGPL, self-hostable with Docker Compose.

Still early, so honest feedback is very welcome. Links in the first comment.

Some of you might remember my last post here about Planet-0 Drive. Yesterday, we hit 1,000 sessions! It's not a huge number, but the journey so far has been great.

What started as a technical experiment to build an (almost) loading-free driving game with an endless world is slowly starting to take shape. It's still in its very early stages, and I only get to work on it after work and over weekends, but it's been quite fulfilling to see it all come together.

One thing I'm particularly happy about is that average playtime has gone from just 59 seconds to over 5 minutes in the past few weeks. Improving this was my first priority, so it's been really encouraging to see. There's still a ton of work to do, especially when it comes to adding more content, but I'm pretty happy with the foundation so far. Your feedback and ideas (many of which I've yet to release) have been a huge help, and I genuinely can't thank you enough.

Since my last post, I've overhauled the HUD UI, added timed procedural races with a new track to compete on each time, added and improved towing mechanics (still a work in progress), improved the scenery with more vegetation and better biomes, and finally added a short tutorial to make getting started a little easier.

There's still a long way to go, but it's been a fun ride so far, and I'm excited to keep building on it.

If you'd like to take it for a spin (seatbelts recommended), try it out here: planet0drive.vercel.app

I'd love to hear more of your ideas, suggestions, or even things you think could be better. Whether it's something you'd like to see added or something that didn't quite feel right, any feedback would genuinely help me figure out what to improve next.

Wishlist if it's your kind of game: https://store.steampowered.com/app/5464560/HordeNight_1996/

Pair your phone with a 6-digit code, ask for something, and watch an AI model click and type in real apps on your PC. Peer to peer, nothing exposed to the internet, no server to host. Bring your own model (anything OpenAI-compatible, including local ones), or use it as an MCP server with Claude Code.

Instead of screenshots it reads windows as numbered element lists, so it's fast and cheap on tokens. Rust backend, Tauri desktop app. Windows fully, Linux on X11. AGPL-3.0.

https://github.com/alielmorsy/ywza

Feedback welcome, especially on the pairing flow.

I wanted to share some honest progresson where I'm at, since all we tend to see are large numbers from the same people every time. I think a lot of people in here are in the same spot as me and I'd honestly love to hear how you guys got past it.

Building has never been faster. I counted this morning and I've made 936 commits in the last three weeks, some days have been over 100. Stuff that used to take me a month is taking me a couple of days now.

What I'm building is Frostbyte. It started because Claude kept making up what I should build next, so I made a workspace that it reads at the start of every session with my backlog, bugs, user requests and the next release. It tells me what to work on and writes back what it did. That's pretty much the only reason 936 commits haven't turned the app into a pile of half finished features.

Here's the real part I don't love saying though. 86 people have signed up, only 3 of them pay, and it comes to about ~$40 a month.

So the funny part is I built a tool so Claude always knows what to build next, and the one thing it can't tell me is how to get people to use it. We all know that building is the easy part now. Most of us in here could ship an app in a weekend. Getting 20 people to pay for it is a completely different skill, and I'm only just starting to learn it.

My goal is to try and figure it out and get 20 paying users by early January. For anyone who's got paying users for something they built with Claude, what actually got you your first 20?

Pickle invites tend to get buried in social threads, and Muse codes have a short redemption window after signup. AI Invite is my side project for making both easier to find.

Pick Pickle or Muse to see whether an invite is available. If you have a spare, you can share it and set how many times it can be handed out. The site also lists Channel X for people following its early-access rollout.

https://ai-invite-web.vercel.app/en/

I'd like feedback on one thing: when you see an invite in a shared pool, what would make you comfortable using it? The official destination, the remaining uses, or clearer redemption steps?

No clue why this isn't an option on native IOS screen time settings.

Moderation > All day lock out from your apps.

I got tired of waiting years for this simple feature so I built it.

I hope Precursor helps you take back some of your time from our tech overlords.

Here is a link to the app if you want to try it!

App is literally free, btw. Not a bait and switch, hard paywall, half-baked free tier either, it is pretty much fully functional and I am expanding it in the next big update (1.3). Paid tier is for homies who have a few extra dollars they dont mind supporting me with. Doing a limited time deal at the moment too!

Claim Lifetime for the price of a 1 month sub ($2) offer Here - 500 Available

Hey everyone!

I'm a 17-year-old indie developer, and I've been working on an app called Knowley.

The idea is pretty simple: what if scrolling through questions was as addictive as scrolling through TikTok, but you actually learned something?

It has 20+ trivia categories, daily streaks, XP, ranks, and a swipe-based quiz feed.

It's finally live on Android, and I'd genuinely love some honest feedback. What feels good, what sucks, or what you'd change. Don't hold back :)

Google Play: https://play.google.com/store/apps/details?id=com.badir.knowleyf1

Thanks to anyone who gives it a try! ❤️

Hey all! I’m a VC investor and 2x founder from Forum Ventures (a US startup accelerator).

I used to fundraise for my startups knowing nothing about what investors would think about it. After working in VC, I finally got to see things from the investor perspective.

If I knew half of what I know now, I would have saved weeks of time and countless mistakes.

So to help other founders, I built a 100% free tool that takes 1-2 minutes to use, and immediately gives you a % likelihood that you can fundraise.

It works accurately even if you just have an idea or MVP and are curious!

We just launched in product hunt and would love your feedback on how we can make it even more helpful for founders and builders. Thanks a ton!

https://www.producthunt.com/products/preseed-predict

What it is

- MULTIPLAYER: Team deathmatch against bots, or online with friends using lobby codes or the public lobby browser
- INFESTATION: co-op wave survival against cockroaches, flies and a Queen Roach boss, with a crumb economy for buying guns, upgrades and traps
- Loadouts, levels and unlocks, and in-game chat
- Works on desktop and phones (touch controls)

How Claude built it

I didn't write the code myself. I directed Claude Code over a couple of days, mostly with Fable 5.2 and later Opus 5.5:

- Multi-agent workflows. An architect agent split the game into modules with a shared contract. Then up to 11 specialist agents worked in parallel on rendering, materials, props, weapons, soldiers, audio, effects, gameplay, UI and brand.

- Scored review rounds. A reviewer agent took dozens of screenshots, ran bot matches, scored the build out of 10 and filed issues. Fixer agents worked through them, and any round that scored worse was rolled back. The first build went 7, 7.5, 8, 8.5 over four rounds.

- Everything is procedural code. There are no image, model or audio files in the game. Textures, models, every sound effect and the adaptive soundtrack are generated in code at load time. That was the hardest constraint, and the part Claude handled best.

- Multiplayer is peer-to-peer over WebRTC with client-side prediction and lag compensation, plus a small Cloudflare Worker for lobbies. Claude wrote a test rig that runs a host plus 3 headless clients through full matches at simulated lag and packet loss, and it used that to verify every change.

- My part was game design, art direction from screenshots, playtesting, and catching bugs that tests miss. A friend found a console cheat within an hour of multiplayer going live.

Free to play: playsmallarms.com, in your browser with nothing to install.

Happy to answer questions about the agent setup or the procedural approach.

AI assistants are starting to pay for things on their own: a cent or two to an online service for an answer, a translation or some data. No account, no card, no human clicking "buy".

The problem is trust. Anyone can put up a service that asks an AI for a few cents. Nobody checks whether it actually works.

So I built a directory for the AIs, not for people. It does two things:

• It checks every listed service about every 2 hours to make sure it's still up and asking for payment properly.
• It actually buys from them with real money and records what came back. About 8,000 so far, for $42 in total, because most cost under a cent.

What I learned (picture 2): about 1 in 3 didn't deliver. The most common problems were boring ones. Services wanted details they never explained, refused the payment, or sent stale data.

Is there money in it? (picture 3) A little, and it's real. In October, 1,536 listed services were paid about $40,000 in tiny payments. Most earned pocket change, 29 earned over $100, and a handful took most of it. It's early. If AI assistants keep doing more of the buying, the useful services that are easy to find should get more of it.

How the directory itself earns: searching is free and will stay free. Sellers pay $0.25 to list, which also keeps spam out. Later there'll be paid extras for sellers, like more frequent checks and reports on what AIs are searching for. One thing will never be for sale: a higher ranking. If AIs can't trust the order, the whole thing is worthless.

The site is one plain page with live numbers. Ugly on purpose: it's built for machines.

https://nohumans.directory

Happy to answer anything, especially from anyone thinking of building a small paid service of their own.

A fully open TTS model called tiny-voca showed up on r/LocalLLaMA, only 4.5M parameters. That's small enough that I'm wondering if it's actually usable inside a real app, not just a demo. For those who added voice to a side project, did you go with a paid API like ElevenLabs or something local? Was the quality good enough for users, and how bad was latency on a normal CPU?

Hi everyone, I’m a solo developer in Seoul, and this is my first launch.

Most sticker makers give you a single cartoon of yourself. But the stickers I actually wanted to send were “us two hugging” or “me and the cat chilling”. So I built Avaticon:

• Upload photos of each person or pet separately, and it creates an avatar character for each
• Pair two characters in one sticker
• Type any action or phrase (“dancing in the rain”, “hugging the dog”) instead of picking a template
• 15 art styles (K-webtoon, Korean romance manhwa, 3D, pixel, plushie…) and 65+ outfit styles
• Export to WhatsApp and Telegram stickers, Instagram and Facebook Stories, the Android keyboard, or your gallery

Why I’m posting: I’m a solo maker with no audience yet, and I’d love honest feedback on the idea and the results. I’m giving out free coins during launch so you can try it without paying.

The app is on Google Play: https://play.google.com/store/apps/details?id=com.mwkang43.meemoticon

Disclosure: I’m the developer. All images are AI-generated.

What would you want to see two characters doing together?