Hinge Caliper
Turn your iPhone Duo's hinge into a precision caliper
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Hinge Caliper turns the iPhone Duo's precision hinge into a measuring tool. Close your Duo on any object and it computes the thickness from the hinge angle — then vibrates and speaks the measurement aloud, so you don't need to see the screen. Includes a 0–180° protractor dial, outer-display mirroring while you work, plus on-screen rulers and bubble levels that run on any iPhone. No ads, no data collection, works offline. $0.99.
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PH · launched Oct 24, 2026 · 1 upvote (top 67%)
- Horizontal
- Prosumer
- Not AI
- Hobby / open-source project
- iOS
- Productivity
- Developer Tools
Similar launches
See all 283 similar launches →Could you build this?
No This depends on the iPhone Duo's hinge angle, which Apple doesn't expose to developers. Accurate measurement also needs hardware-level calibration.
What it would actually take: Would require access to hinge-angle sensor data through private APIs or custom hardware, plus calibration against known reference thicknesses. Without Apple's cooperation, the core sensing isn't available to third-party developers.
Competitors
Other products that read as similar to this one : 283 launches clear the similarity bar, closest 8 shown.
Attention rank: #143 of 284 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 222 days after the earliest competitor.
- kakdo°: Angle Protractor · ph · 2026-10-21 · 2 upvotes · similarity 0.57
- Fold Toys: Spooky iPhone Duo App · ph · 2026-10-27 · 1 upvotes · similarity 0.55
- Simple Ruler · ph · 2026-10-20 · 1 upvotes · similarity 0.54
- duo-open · github · 2026-09-11 · 35 upvotes · similarity 0.54
- Stress Less - Built for iPhone Duo · ph · 2026-10-24 · 3 upvotes · similarity 0.51
- iPhone-Duo-by-Examples · github · 2026-09-19 · 30 upvotes · similarity 0.50
- iPhone Duo · ph · 2026-09-10 · 269 upvotes · similarity 0.48
- WinDuo · ph · 2026-09-14 · 1 upvotes · similarity 0.47