Celestial Strings
A free tuner, metronome & ear trainer for musicians
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Hey Product Hunt! I built Celestial Strings because I was tired of paying for (or juggling) separate apps just to tune my guitar, keep time, and train my ear. It's one free app that does all three, with a custom pitch-detection engine (McLeod Pitch Method) for fast, accurate tuning. Would love your feedback — what would make this a daily tool for you? Happy to answer any questions here today.
PH · launched Sep 14, 2026 · 1 upvote (top 69%) · 1 view
Niche: music education and practice apps · 185 launches, 16 in the last 7 days ▼ -36% · Explore this niche →
Category and tags
- Media & entertainment
- Vertical SaaS
- B2C
- Not AI
- Hobby / open-source project
- iOS
- Mac
- Music
Visit website ↗ Source listing ↗
More like this: all 185 launches in music education and practice apps →
Could you build this?
Partial A high-performance, real-time native guitar tuner requires low-latency DSP (digital signal processing) and precise audio buffering in Swift/AVAudioEngine that goes beyond typical prompt generation.
What it would actually take: The app requires low-level audio engineering using Apple's AudioKit or native AVAudioEngine / CoreAudio with Accelerate vDSP for real-time sample processing. Implementing the McLeod Pitch Method (MPM) accurately involves calculating the Normalized Square Difference Function (NSDF), peak picking, and parabolic interpolation on high-rate audio buffers with minimal latency and jitter. Developing this requires specialized knowledge of digital signal processing (DSP) and real-time thread safety on iOS.
Competitors
Other products that read as similar to this one : 169 launches clear the similarity bar, closest 8 shown.
Attention rank: #142 of 170 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 302 days after the earliest competitor.
- Tuneara · ph · 2026-11-03 · 3 upvotes · similarity 0.56
- GUITARTUNINGS · ph · 2026-09-25 · 1 upvotes · similarity 0.55
- LarkTune · ph · 2026-10-27 · 1 upvotes · similarity 0.52
- Melodic Strings · ph · 2026-10-17 · 3 upvotes · similarity 0.51
- Tuner Dude · ph · 2026-10-27 · 3 upvotes · similarity 0.51
- PickBeat · ph · 2026-10-07 · 2 upvotes · similarity 0.51
- Hestia Tuner & Metronome · ph · 2026-09-25 · 1 upvotes · similarity 0.50
- GuitarHub: Tuner & Metronome · ph · 2026-09-14 · 1 upvotes · similarity 0.50
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.