# SimpleTone vs Centerline

The clearest difference is in-app purchases: SimpleTone at none against Centerline's 1. Centerline's advantage is ratings volume (3 vs 1) and iOS requirement (17.0 vs 26.1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Centerline sells 1 one-off in-app purchase. SimpleTone asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SimpleTone against 5.0 for Centerline. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

## The numbers

| Metric | SimpleTone | Centerline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/simpletone/id6760437802/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/centerline-chromatic-tuner/id6801356258/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 3 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | iPhone, iPad | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Evan Brass](https://appshunter.io/developer/821378174) | [Endpaper Labs LLC](https://appshunter.io/developer/6793820240) |

## What reviewers say

### SimpleTone

[App page](https://appshunter.io/ios/app/simpletone/id6760437802)

This application provides a straightforward virtual tuning fork. Simply select your desired pitch to tune your instrument. It aims to offer a no-nonsense, ad-free experience for musicians.

**Highlights:** Virtual tuning fork, Pitch selection, Ad-free experience, Simple interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Centerline

[App page](https://appshunter.io/ios/app/centerline-chromatic-tuner/id6801356258)

This app offers free chromatic tuning for various instruments, identifying notes, sharps, and flats. It includes a dedicated guitar mode with automatic string detection and optional advanced tuning tools for purchase.

**Highlights:** Free chromatic tuning, Dedicated guitar mode, Automatic string detection, Pitch history tracking, Offline functionality, No ads or accounts

**In-app purchases (1)**

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


## Frequently asked questions

### Is SimpleTone free?

SimpleTone is free to download, with no in-app purchases.

### Is Centerline free?

Centerline is free to download, with in-app purchases available.

### Which has better reviews, SimpleTone or Centerline?

SimpleTone and Centerline are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do SimpleTone or Centerline have ads?

Neither SimpleTone nor Centerline shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*