# Jam Synth vs jAmp Doubler

The clearest difference is in-app purchases: jAmp Doubler at none against Jam Synth's 4. jAmp Doubler also leads on update cadence (every 9 days vs every 4 months) and review sentiment (100% vs 84%). Jam Synth's advantage is ratings volume (28 vs 4) and iOS requirement (12.0 vs 14.0). On price, rating, ads and device support there is nothing between them.

Both are free to download. Jam Synth sells 4 one-off in-app purchases. jAmp Doubler asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Jam Synth against 5.0 for jAmp Doubler. That said, the two scores are not equally well evidenced: Jam Synth has 28 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 84% of Jam Synth's written reviews are positive against 100% of jAmp Doubler's.

Jam Synth ships an update every 4 months, jAmp Doubler every 9 days. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Jam Synth | jAmp Doubler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (28 ratings)](https://appshunter.io/ios/app/jam-synth/id732618765/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/jamp-doubler/id6475082851/reviews) |
| Number of ratings | **28** | 4 |
| Positive reviews | 84.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 6 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Derek Mesecar](https://appshunter.io/developer/505825864) | [Jan Maes](https://appshunter.io/developer/1550506252) |

## What reviewers say

### 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 |


### jAmp Doubler

[App page](https://appshunter.io/ios/app/jamp-doubler/id6475082851)

This audio plugin creates a stereo effect by introducing a subtle delay to one audio channel. It offers precise control over the delay time and can be managed via MIDI. Ideal for enhancing mono audio sources with a wider soundstage.

**Highlights:** Stereo widening effect, Adjustable delay time (0-50 microseconds), MIDI control, AUv3 plugin format, Enhances mono audio

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Jam Synth free?

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

### Is jAmp Doubler free?

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

### Which has better reviews, Jam Synth or jAmp Doubler?

Jam Synth and jAmp Doubler are both rated 5.0 out of 5 on the App Store, from 28 and 4 ratings respectively.

### Do Jam Synth or jAmp Doubler have ads?

Neither Jam Synth nor jAmp Doubler shows ads.

### Which is updated more often, Jam Synth or jAmp Doubler?

Jam Synth ships an update every 4 months, and jAmp Doubler every 9 days. Most recently, Jam Synth was updated on October 6, 2026 and jAmp Doubler on October 12, 2026.

---

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