# Centerline: Chromatic Tuner — Clear pitch. No ads. Offline.

> Clear pitch. No ads. Offline. (iPhone/iPad app by Endpaper Labs LLC.)

- Source: https://appshunter.io/ios/app/centerline-chromatic-tuner/id6801356258 (this page in markdown: same URL + `.md`)
- Developer: [Endpaper Labs LLC](https://appshunter.io/developer/6793820240)
- Category: Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-08-25
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/centerline-chromatic-tuner/id6801356258/reviews.md

## What is Centerline?

Tune the note you play.

Play one note and see its name, whether it is flat or sharp, and where it settles. Centerline gives musicians free chromatic tuning from 62 to 800 Hz, plus a dedicated six-string Guitar mode.

CHROMATIC TUNING, FREE
Chromatic mode follows the nearest note, including sharps and flats. Use Simple for a clear direction, Trail to follow your pitch history, Strobe for fine adjustments, or Workbench for cents and frequency. All four views are free.

A DEDICATED GUITAR MODE
Guitar mode adds automatic string detection and direct string selection. Standard tuning is free. All Strings keeps track of the strings you have played; Guitar offers a familiar headstock view. All six Guitar views are free.

YOUR PREFERRED VIEW
Simple is your starting view. Trail shows six seconds of pitch history and can rotate between vertical and horizontal. Centerline remembers your preferred view in each mode.

OPTIONAL EXTRA TUNING TOOLS
Centerline Complete is a one-time purchase for Drop D, Half step down, D standard, DADGAD, Open G, custom six-string tunings, capo settings, A4 calibration from 432 to 446 Hz, and reference tones. No subscription. Restore Purchase is available in the app. The store shows your local price.

PRIVATE BY DESIGN
Pitch analysis happens on your device. Centerline does not record or upload your audio. There are no ads, accounts, or analytics inside the app. Tuning works offline.

Play one note or string at a time. All Strings remembers individual readings; it does not measure a chord at once. Chromatic mode supports 62 to 800 Hz and does not cover the full piano range or a bass guitar's lowest notes.

Questions or feedback: wyatt@endpaperlabs.com
Privacy: https://centerlinetuner.com/privacy

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Centerline Complete | $3.99 | one-time |



## Version history (last 3 releases)

### 1.5.2 — 2026-09-07

New in 1.5.2:
• A steadier Trail view while notes ring.
• Clearer explanations of free tuning and optional Complete tools.
• More reliable purchase restoration and recovery.
• The About screen shows the installed version.

### 1.5.0 — 2026-09-07

New in 1.5.0:
• Free Chromatic mode follows the nearest note from 62 to 800 Hz.
• Trail view shows six seconds of pitch history, vertically or horizontally.
• Simple remains the starting view, with display preferences saved for each mode.
• Refreshed tuning controls and clearer pitch feedback.
• Centerline Complete adds custom six-string tunings and capo settings.

### 1.0 — 2026-08-25

No release notes.

## More apps by Endpaper Labs LLC

- [Verdict: Daily Logic Puzzles](https://appshunter.io/ios/app/verdict-daily-logic-puzzles/id6793820238)
- [Terra Tempus: History Map Game](https://appshunter.io/ios/app/terra-tempus-history-map-game/id6793821323)

All apps by Endpaper Labs LLC: https://appshunter.io/developer/6793820240

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-11.*