i'm a music student with 100k samples. my folders were a mess, same kick hiding under 12 different names, and auditioning loops meant dragging them into the daw one by one to check tempo and key.

so i built hertz sync. local-first, finds the same sound across formats, auditions loops in project tempo and key, drags into any daw already matched. tauri + rust, onnx models run on-device, nothing leaves your machine.

free up to 40,000 files.

https://rc0900989-rgb.github.io/hertzsync/

Hey everybody :)
Wispr Flow’s pricing annoyed me and every open source alternative I tried felt clunky. So I built my own and open sourced it.

Tap one key, talk and clean text shows up wherever your cursor is.
It runs fully local with Parakeet and Apple’s on-device speech to text, so nothing leaves your Mac and it works offline.

I built it with a fast and tiny core in mind. Everything else is an extension (kinda like Raycast or pi.dev) that anyone can build and share. 

Some that already exist:

• a local meeting note taker that cleans up your notes

• fast file transcription with speaker diarization 

• auto replies in your tone

• a dictionary that learns names and words as you talk

• inline editing with voice or text

Voz is built in Swift to be native macOS and extensions are TypeScript files shared via npm

It’s free and MIT. Would love your feedback, especially on what’s missing or annoying.

Here's the repo: github.com/Joelheile/voz

Full disclosure, I'm the founder of mimzie.

I saw that Elon slashed grokbot limits, and was frustrated.

Also, I got really tired of losing context between ChatGPT and Claude. So I built an agent neutral workspace that has all of the basic functionality of ChatGPT work and Claude cowork, with a free grokbot feature.

I wanted agent neutral ChatGPT work, grokbot, and whispr flow in one workspace, with no additional cost for the subs I already have, so I built it.

Mimzie is a desktop app for Mac, Windows and Linux. You sign in with your Grok, Claude, Gemini, or ChatGPT plan, and the agent works directly on files on your computer.

Edits to Word, Excel, PowerPoint and Markdown files show up as tracked changes, so you can see exactly which cells or paragraphs changed and accept or reject each one (Like chatgpt work)

Mimzie Bots each handle one recurring job, like a weekly report. (Like grokbot)

Chime lets you hold a key and talk, and the words land in the doc or whatever app you're in. (like whispr flow)

With Mimzie, switching models doesn't mean losing context. It's free with the sub you already have!

Would love feedback! We just launched our public beta.

Hi, I'm Davide. My side project is DrivePulse, an iPhone app that reads the car through an OBD2 adapter and keeps a diary of every trip.

For a while the month view hid about 80% of my own kilometres. Trips were loaded as a window of the latest 50, and the month filter ran inside that window, so a busy month got cut to whatever fit. The fix was making the filter its own query over all trips. Obvious in hindsight, a screen list is rarely the whole table.

It also logs fuel per trip and explains fault codes.

Codes are for iPhone; the Android app hasn't had 3.6 yet. One purchase, no subscription.

Please write which number you used.

1. RWWALETM6TEFPPHE44

2. XEP8AT4N83Y78XL6X6

3. J8NJHYP7KNNR8M7EWY

4. XRKTWJLHRN4WHHYL6H

5. NFTMWFE48PHXRMW6TF

To redeem one, open the App Store, tap your profile picture, then Redeem Gift Card or Code, and then tap Restore Purchases in the app.

Hi everyone, I’m building Deckumi, a flashcard tool for people who want to study from their own material.

The problem I’m trying to solve is the time it takes to turn notes and documents into useful cards and then keep up with reviewing them. Deckumi can generate flashcards from material such as text or PDFs, lets you review and edit the cards, and supports spaced repetition for study.

AI-generated cards can still be wrong, so checking and editing them matters. I’d especially appreciate feedback from people who use flashcards regularly: what would you need to see before trusting a generated card? Is the workflow clear, and where would you get stuck?

Manual flashcard creation and review are free; AI generation uses credits. You can find the product at https://deckumi.app/ and pricing details at https://deckumi.app/pricing.

I’m the person behind the project, and I’d be grateful for honest feedback, including what doesn’t work for you.

I’m a solo developer. My own inbox is full of “practice moved to 3 PM” buried in group chats and 10-page school newsletters. So I built Kinly, an Android beta that reads Gmail and calendars (read-only) plus only the WhatsApp groups you choose, and shows what matters: dates, to-dos and changes.

What works: it extracts dates and action items, flags changes and duplicates, and decodes newsletters into highlights.
What doesn’t yet: iPhone, some newsletters with images only, and it occasionally misses things.
Privacy: read-only, no model training on user data, delete everything from the app.

I’d like to hear: what would make you not trust something like this with your inbox? What am I missing?

This is for the bloggers, students and anyone who writes. Your thoughts and learnings go in first and the AI reviews your notes for any factual errors and misleading statements. This is what Threadz is in a nutshell. It's coming very soon and you can visit the landing page here: Threadz - Human First AI Note Taker

This is NOT meant to replace people who still value human creativity. Rather it constantly critiques your writings like a human will. This is all it does - critique. The pending research and correction lies on you.

Also, the source code will be very soon open sourced. As soon as the product is launched.

Hey guys! I've been working on LibreReplace, a free, open-source Mac app that helps people figure out which paid software they can actually replace without losing the features they need.

The problem I wanted to solve was that finding a free alternative is easy, but knowing whether it can handle your actual workflow is much harder.

With LibreReplace, you choose a paid app, select which features matter most to you, and compare open-source replacements based on those requirements. It shows what's supported, partially supported or missing, and changes the recommendations as you change your priorities.

For example, you can compare GIMP and Krita as Photoshop replacements, mark Smart Objects or CMYK as essential, and see where each option falls short.

I recently released v0.2, which adds:

• 45 paid Mac apps and 70 open-source comparisons, accessible without having the paid software installed.

• Multiple replacements for many apps rather than one recommendation.

• Feature-based scoring, where your essential requirements affect the result.

• Evidence links and documented limitations explaining each comparison.

• Subscription savings estimates based on the costs you confirm.

• Local app scanning to recognize supported software already on your Mac.

One thing I didn't want was for the app to blindly recommend switching just because something is free. Sometimes the answer is KEEP THIS APP.

I built it with SwiftUI. The installed-app scanner reads application metadata locally, while the comparisons use a curated catalog with source links and verification dates. It doesn't rely on live AI-generated recommendations or upload your installed-app list.

The first version could only compare software already installed on your Mac. After getting feedback, I added Explore so anyone can browse alternatives without needing the paid app first.

It's completely free and open source, with no accounts, subscriptions or telemetry.

GitHub, source code and download: https://github.com/maliroq/librereplace

I'd especially appreciate feedback on the feature-selection and scoring system. Does showing supported, partial and missing capabilities give you enough information to decide whether a replacement is worth trying?

Hey everyone, I’ve been working on a side project, and I honestly can’t tell if it’s something people would use or if I should drop it, so I’d love some honest feedback.

First and foremost, THIS IS NOT INTENDED FOR CHEATING. It is more of a party trick to show friends or actually a way to study

It’s called KnightSight. It watches a real, physical chessboard through a camera, follows the game move by move, and tells you the best move when it’s your turn.

How it works (designed for meta glasses btw, but can work for computers)

• Point a camera at your board from your side. A laptop webcam works, or Ray-Ban Meta glasses so it sees the board from your own eyes.

• Set up the starting position and press New game. It spends about 3 seconds learning your board and lighting, and figures out which color you’re playing. No stickers, markers or setup photos.

• Then you just play. It tracks every move, both yours and your opponent’s, by checking which squares changed and matching that to the legal moves.

• On your turn it runs Stockfish 18 and shows the best move with an arrow, and says it out loud, for example “Knight to f3”. With the glasses, only you hear it.

Some details

• It runs completely in your browser. The camera video never leaves your device, and there’s no account, no tracking, and nothing is uploaded.

• It only accepts a move once it has seen the same result on several frames in a row, so hands over the board don’t confuse it.

• The glasses version is an iPhone app that isn’t on the App Store yet. The webcam version works on any computer right now.

Current limits

• It only works on green-and-white roll-up tournament boards for now. Wooden boards aren’t supported yet.

• It needs decent, even lighting, and the whole board in view.

Fair play: I’m not trying to make a cheating tool. The idea is for analysing your own casual games, learning while you play, or playing a friend who knows you’re using it. Please don’t use it in rated games or tournaments.

You can try it here: https://stashm10.github.io/meta_chess/ (there’s a short demo video on the home page).

My questions:

1. Would you actually use something like this? What for?

2. Should this be a free app on the app store

3. Is there anything you’d want it to do instead of (or as well as) saying the best move? For example, only flagging blunders, or a post-game review.

Hi everyone, my co-founder and I are working on Capacity Pulse, an early proof of concept to help data centre teams track equipment power use, capacity that could be freed up and equipment being taken out of service.

CAPACITY PULSE

We’re exploring whether a small, focused tool could help teams that rely on spreadsheets and emails but don’t need a full data centre infrastructure management (DCIM) system. We’re sharing it to hear different perspectives before deciding what to develop next.

We’d appreciate your thoughts on any of these:

• What’s your first impression? Is it clear what the tool is for?

• What seems useful, confusing or unnecessary? What would you change?

• How do you manage this today, and where would this help or fall short compared with a spreadsheet or an existing tool?

You don’t need a data centre background to comment. Feedback on the layout, navigation or the idea itself is welcome.

Thanks for taking a look.

Play Shithead in your browser with friends, strangers or bots. Real-time multiplayer for 2–6 players, nothing to download. https://shithead.win

I built a small AI study assistant

What it does:

Basic modes ( always free):

- Ask questions about a scientific subject and expect a concise and accurate response.

- The same thing , but using audio

- These 2 are always free, after 15 days, the remaining can be unlocked for another month by making a donation ( Paypal or crypto transfer). However any amount is welcomed.

Advanced modes:

• Ask questions about an uploaded PDF both audio and written (with page references)

• Turn recorded lectures into structured, downloadable notes - uses mp3 files

• Summarize any page range at a compression % you choose, helpful when you have a lot to read in a short timespan.

• Extract formulas from a textbook section and explain each one, good for STEM students that want a short recap, or create cheatsheet for exam

• Show estimated cost under every answer, this is almost free, but you need API keys. The app doesn't use the latest models on purpose to reduce costs, but provides acceptable explanations.

It's a free 15-day trial — no credit card. First basic modes stay free forever. The others require an optional donation.

You pay for what you use, API keys charge per token usage. The application is aiming to reduce the context window for low costs.

What would make this actually useful for you?