# TestTone vs Jam Synth

The clearest difference is price: Jam Synth at Free against TestTone's $1.99. Jam Synth also leads on iOS requirement (12.0 vs 15.6). TestTone's advantage is in-app purchases (none vs 4). On update cadence, ads and device support there is nothing between them.

Jam Synth is free to download; TestTone costs $1.99 up front. Jam Synth sells 4 one-off in-app purchases. TestTone asks for nothing beyond the download.

TestTone ships an update every 6 months, Jam Synth every 4 months. The most recent releases landed on September 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | TestTone | Jam Synth |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (28 ratings)](https://appshunter.io/ios/app/jam-synth/id732618765/reviews)** |
| Number of ratings | — | **28** |
| Positive reviews | — | 84.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 5 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HTLab](https://appshunter.io/developer/384289233) | [Derek Mesecar](https://appshunter.io/developer/505825864) |

## What reviewers say

### TestTone

[App page](https://appshunter.io/ios/app/testtone/id384289230)

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

**In-app purchases:** none


### Jam Synth

[App page](https://appshunter.io/ios/app/jam-synth/id732618765)

Transform your guitar into a synthesizer with this app. It accurately tracks pitch and amplitude to control digital oscillators, offering unique synth leads and effects. Go beyond MIDI with expressive, organic sounds and advanced modulation options.

**Highlights:** Monophonic guitar synthesizer, Pitch and amplitude tracking, Multiple oscillator wave shapes, Dynamic filter tracking, Advanced FX section (LFO, Delay, Harmonizer, etc.), MIDI output for external synths, High-accuracy pitch tuner

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intelligent Harmonizer | Free | one-time |
| Rotary Vibe | Free | one-time |
| Rainbows | Free | one-time |
| Time Stopper | Free | one-time |


## Frequently asked questions

### Is TestTone free?

TestTone costs $1.99, with no in-app purchases.

### Is Jam Synth free?

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

### Do TestTone or Jam Synth have ads?

Neither TestTone nor Jam Synth shows ads.

### Which is updated more often, TestTone or Jam Synth?

TestTone ships an update every 6 months, and Jam Synth every 4 months. Most recently, TestTone was updated on September 13, 2026 and Jam Synth on September 18, 2026.

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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.*