# BT 303 Pocket vs Synesthesia Synth

The clearest difference is in-app purchases: Synesthesia Synth at none against BT 303 Pocket's 22. Synesthesia Synth also leads on update cadence (every 10 days vs monthly). BT 303 Pocket's advantage is iOS requirement (9.3 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. BT 303 Pocket sells 22 one-off in-app purchases. Synesthesia Synth asks for nothing beyond the download.

BT 303 Pocket ships an update monthly, Synesthesia Synth every 10 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | BT 303 Pocket | Synesthesia Synth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/synesthesia-synth/id6763379132/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 141 MB |
| Requires iOS | **9.3** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kimberly Young](https://appshunter.io/developer/1685697818) | [MICHELE ZACCAGNINI](https://appshunter.io/developer/1895288560) |

## What reviewers say

### BT 303 Pocket

[App page](https://appshunter.io/ios/app/bt-303-pocket/id6732860204)

This pocket-sized synthesizer emulates classic TB-303 sounds with modern controls for electronic music creation. Explore endless creative possibilities for producers.

**Highlights:** Pocket-sized acid synthesizer, Classic TB-303 sounds, Modern controls, Electronic music production, Creative sound design

**Features:** macOS Compatibility

**In-app purchases (22)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Save Slot 13 | $0.99 | one-time |
| Save Slot 14 | $0.99 | one-time |
| Save Slot 15 | $0.99 | one-time |
| Save Slot 16 | $0.99 | one-time |
| Save Slot 17 | $0.99 | one-time |
| Save Slot 18 | $0.99 | one-time |
| Save Slot 19 | $0.99 | one-time |
| Recording credit | $0.99 | one-time |
| Save slot 3 | $1.99 | one-time |
| Save slot 2 | $1.99 | one-time |
| Save slot 1 | $1.99 | one-time |
| Save slot 9 | $1.99 | one-time |
| Save slot 10 | $1.99 | one-time |
| Save slot 13 | $1.99 | one-time |
| Save slot 17 | $1.99 | one-time |
| Save slot 19 | $1.99 | one-time |
| Save slot 14 | $1.99 | one-time |
| Save slot 15 | $1.99 | one-time |
| Save slot 18 | $1.99 | one-time |
| Save slot 16 | $1.99 | one-time |
| Save slot 20 | $1.99 | one-time |
| 5 recording credits | $3.99 | one-time |


### Synesthesia Synth

[App page](https://appshunter.io/ios/app/synesthesia-synth/id6763379132)

An experimental audio-visual instrument that allows users to sculpt evolving spatial audio by manipulating floating capsules. Position, rotation, and pulse changes affect tone, texture, and synchronized particle generation. It's a visual synthesizer, not a game.

**Highlights:** Experimental audio-visual instrument, Sculpt evolving spatial audio, Manipulate floating capsules, Control tone, texture, and particles, Visual synthesizer

**In-app purchases:** none


## Frequently asked questions

### Is BT 303 Pocket free?

BT 303 Pocket is free to download, with in-app purchases available.

### Is Synesthesia Synth free?

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

### Do BT 303 Pocket or Synesthesia Synth have ads?

Neither BT 303 Pocket nor Synesthesia Synth shows ads.

### Which is updated more often, BT 303 Pocket or Synesthesia Synth?

BT 303 Pocket ships an update monthly, and Synesthesia Synth every 10 days. Most recently, BT 303 Pocket was updated on October 24, 2026 and Synesthesia Synth on October 19, 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.*