# TerribleSync vs TranceXY

The clearest difference is in-app purchases: TerribleSync at none against TranceXY's 1. TerribleSync also leads on iOS requirement (12.0 vs 16.0). TranceXY's advantage is update cadence (every 8 days vs every 35 months). On price, ads and device support there is nothing between them.

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

TerribleSync ships an update every 35 months, TranceXY every 8 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TerribleSync | TranceXY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/terriblesync/id1109759662/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 1 MB | 53 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Benjamin Roth](https://appshunter.io/developer/448057425) | [Tomocreate, Inc.](https://appshunter.io/developer/1895224165) |

## What reviewers say

### TerribleSync

[App page](https://appshunter.io/ios/app/terriblesync/id1109759662)

Control the tempo of music hardware like synthesizers and drum machines using your iPhone or iPad. Features include tap tempo, precise dial adjustment, and buttons for performance effects. Requires a 3.5mm audio cable for connection.

**Highlights:** Tap tempo, Rotary tempo dial, Pause/mute button, Performance effect buttons, Clear interface, Open source project

**Features:** macOS Compatibility

**In-app purchases:** none


### TranceXY

[App page](https://appshunter.io/ios/app/trancexy-theremin-synth/id6782832398)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TranceXY Pro | $14.99 | one-time |


## Frequently asked questions

### Is TerribleSync free?

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

### Is TranceXY free?

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

### Do TerribleSync or TranceXY have ads?

Neither TerribleSync nor TranceXY shows ads.

### Which is updated more often, TerribleSync or TranceXY?

TerribleSync ships an update every 35 months, and TranceXY every 8 days. Most recently, TerribleSync was updated on October 24, 2026 and TranceXY on October 25, 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.*