# BT 303 Pocket — Transistor Bass Synthesiser > Pocket-sized acid synthesizer with classic TB-303 sounds and modern controls. (iPhone/iPad app by Kimberly Young.) - Source: https://appshunter.io/ios/app/bt-303-pocket/id6732860204 (this page in markdown: same URL + `.md`) - Developer: [Kimberly Young](https://appshunter.io/developer/1685697818) - Category: Music - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 9.3 · 4 MB - Released: 2024-10-03 - Data updated: 2026-07-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/bt-303-pocket/id6732860204/reviews.md ## What is BT 303 Pocket? Pocket-sized acid synthesizer. Classic TB-303 sounds, modern controls, endless creative possibilities for electronic music producers. ## Key features - Pocket-sized acid synthesizer - Classic TB-303 sounds - Modern controls - Electronic music production - Creative sound design ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | 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 | | 5 recording credits | $3.99 | 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 | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/bt-303-pocket/id6732860204/reviews.md ### 3/5 — Observation *2024-10-05* The sound- Sheer Awesomeness AUv3 support- the description is one of the most worst examples an app in AppStore shouldn’t be following. No scales or modals selection available. Best wishes. Recently released maybe. Lot to do. Brams set the level so so high! ## Frequently asked questions about BT 303 Pocket ### What kind of sounds does BT 303 Pocket create? BT 303 Pocket is designed to emulate the classic TB-303 sounds, known for its distinctive acid basslines. It offers a range of sonic textures suitable for electronic music production. ### Is BT 303 Pocket suitable for beginners? While it offers classic sounds, the 'modern controls' suggest it can be accessible for beginners interested in electronic music. The app is rated for ages 4+. ### What devices support BT 303 Pocket? BT 303 Pocket is available for iPhone, iPad, and iPod. It is designed for mobile music creation on Apple devices. ### How often is BT 303 Pocket updated? The latest version is 1.6, released on May 8, 2026. This indicates active development, though specific update frequency is not detailed. ### Does BT 303 Pocket have ads? No, BT 303 Pocket does not contain advertisements. This allows for an uninterrupted music production experience. ### What are the in-app purchases for BT 303 Pocket? The app is free to download and use, with optional in-app purchases available. These likely offer expanded features or sound packs for enhanced creative possibilities. ### Can BT 303 Pocket be used offline? As a synthesizer app designed for music production, it is expected to function offline, allowing users to create music without an internet connection. ### What is the developer of BT 303 Pocket? BT 303 Pocket is developed by Kimberly Young. This indicates a specific developer focused on this music application. ## Version history (last 5 releases) ### 1.6 — 2026-05-08 Fresh UI overhaul with redesigned knobs, buttons, and step sequencer grid. Everything feels tighter, more responsive, and easier to tweak on the fly. New record feature to capture your jams straight from the app and share them directly from your device. Hit record, lay down a pattern, and export when you're done. New key & mode selector so you can choose your key and scale mode before hitting Random. No more out-of-key patterns every randomised sequence now stays musical. ### 1.5 — 2026-03-09 In app recording enabled ### 1.4 — 2026-02-10 Recording credits. Improved UI. ### 1.2 — 2024-10-18 1.2 Minor bug fixes ### 1.1 — 2024-10-13 Updated saving bug fix on slots 11 - 20 ## Apps similar to BT 303 Pocket | App | Rating | Price | Category | | --- | --- | --- | --- | | [AudioKit FM Player 2: DX Synth](https://appshunter.io/ios/app/audiokit-fm-player-2-dx-synth/id1307785646) | 4.8 (3,265) | Free | Music | | [DynaBunny](https://appshunter.io/ios/app/dynabunny/id6744603146) | 5.0 (4) | $0.99 | Music | | [Poly 2](https://appshunter.io/ios/app/poly-2/id1477029326) | 4.8 (624) | Free | Music | | [2XB303 Acid Bass Loop Maker](https://appshunter.io/ios/app/2xb303-acid-bass-loop-maker/id1288067698) | 4.7 (53) | $1.99 | Music | | [iJumpstyle - Hardstyle Drums](https://appshunter.io/ios/app/ijumpstyle-hardstyle-drums/id492153069) | 3.0 (6) | Free | Music | | [AudioKit Digital D1 Synth](https://appshunter.io/ios/app/audiokit-digital-d1-synth/id1436905540) | 4.8 (2,007) | Free | Music | ## More apps by Kimberly Young - [Pocket 303](https://appshunter.io/ios/app/pocket-303/id6448705223) - [Stylus Synthsiser](https://appshunter.io/ios/app/stylus-synthsiser/id6503651551) - [FM Pocket Synthesiser](https://appshunter.io/ios/app/fm-pocket-synthesiser/id6774350451) All apps by Kimberly Young: https://appshunter.io/developer/1685697818 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-08.*