# Tuning Fork Pro vs e

The clearest difference is price: e at Free against Tuning Fork Pro's $9.99. e also leads on in-app purchases (none vs 2) and ads (none vs shown). Tuning Fork Pro's advantage is update cadence (every 2 weeks vs every 2 months). On device support and iOS requirement there is nothing between them.

e is free to download; Tuning Fork Pro costs $9.99 up front. Tuning Fork Pro sells 2 one-off in-app purchases. e asks for nothing beyond the download.

Tuning Fork Pro ships an update every 2 weeks, e every 2 months. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Tuning Fork Pro | e |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.3 (35 ratings)](https://appshunter.io/ios/app/tuning-fork-pro/id1390334198/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Paid | — |
| Size | 11 MB | 23 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pedro Daniel Macalupu Cumpen](https://appshunter.io/developer/492172409) | [Erda](https://appshunter.io/developer/1587686032) |

## What reviewers say

### Tuning Fork Pro

[App page](https://appshunter.io/ios/app/tuning-fork-pro/id1390334198)

This app helps musicians tune their instruments by ear using precise tone generation. It offers a wide range of notes and calibration options with various waveform selections. The app is designed for ease of use and compatibility with external audio devices.

**Highlights:** Note generation from A1 to C7, A4 Calibration (415Hz to 466Hz), Sine, Square, Triangle, Sawtooth waveforms, Output volume control, Precise tone emission algorithm, External speaker compatibility

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |
| A4 Calibration & Harmonics | $1.99 | one-time |


### e

[App page](https://appshunter.io/ios/app/e-tuner/id1587686030)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tuning Fork Pro free?

Tuning Fork Pro costs $9.99, and also offers in-app purchases.

### Is e free?

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

### Do Tuning Fork Pro or e have ads?

Tuning Fork Pro shows ads; e does not.

### Which is updated more often, Tuning Fork Pro or e?

Tuning Fork Pro ships an update every 2 weeks, and e every 2 months. Most recently, Tuning Fork Pro was updated on October 11, 2026 and e on September 29, 2026.

---

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