# Pure Acid — Bassline Synth & Drums (AUv3)

> Retro analog bassline synth and drum machine with modern features. (iPhone/iPad app by Dmitrij Pavlov.)

- Source: https://appshunter.io/ios/app/pure-acid/id1481283602 (this page in markdown: same URL + `.md`)
- Developer: [Dmitrij Pavlov](https://appshunter.io/developer/478154322)
- Category: Music, Entertainment
- Price: $14.99 with in-app purchases
- Rating: 4.90/5 from 165 App Store ratings · 150 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 44 MB
- Languages: American English
- Released: 2019-11-17
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/pure-acid/id1481283602/reviews.md

## What is Pure Acid?

Pure Acid is a top quality bassline synthesizer and drum machine in one app! Inspired by classic hardware bassline synthesizers and rhythm machines, which changed musical world back in 80's, like the legendary TB-303 synthesizer, TR-808 / 707 / 909 rhythm boxes and their numerous replicas, Pure Acid is designed to bring back the feeling of retro analog gear in every detail in terms of sound, as well as to provide new functions previously unavailable in the original devices to make your music creation workflow fast and fun! A large number of factory preset patterns will immerse you into an exciting world of Acid House, Techno, Hardcore and Big Beat music genres, which will inspire you to create your own basslines and rhythms for your compositions!

You can use Pure Acid app as a ready-to-go realtime musical instrument (groove box) in your jam sessions together with Ableton Link to synchronize it with the rest of your music gear. Its bassline editing system and randomization options will be handy to create unique groovy basslines easily. Realtime master effects with XY-pad controls can add expression to your live performance. You can also use Pure Acid with AudioBus, AUM or other IAA-supporting apps to create complex and interesting sound setups.

Features:

• supports AUv3, Ableton Link, AudioBus, Inter-App Audio, Core Midi, Virtual Midi In/Out, Bluetooth Midi
• AudioBus state saving support
• 64-bit sound engine
• Midi Learn
• Export to midi file
• includes Multiple Output AUv3 plugin with 6 audio output busses

Bassline Section:

• 2 classic bassline waveforms: Saw and Pulse
• classic knobs: Tune, Cutoff, Resonance, Env Mod, Decay and Accent
• Distortion effect with amount, HPF and Boost knobs
• filter LFO with rate and depth knobs

Sequencer Section:

• up to 12 bassline patterns can be stored in one preset
• up to 32 steps per each bassline pattern
• patterns can be chained together to create more complex patterns
• pattern Tempo and Swing parameters
• Gate parameter, which allows you to adjust bass note lengths
• Pattern Editor allows you to copy, transpose patterns, shift notes left/right, insert or delete a note, variate (randomize all note properties expect pitch), shuffle (randomize notes order only), reverse and compose patterns using Bassline Composer function
• onscreen keyboard allows you to enter bassline notes in a comfortable way. You can also record basslines in realtime.

Drums Section:

• 16 independent drum parts
• 35 different classic drum sounds with ability to tune your own drum kit
• each drum part sound has its own parameters: Tune, Decay, Attack/Snap/Color, FX A send, FX B send, Boost, Pan, Level
• up to 12 drum patterns and 4 drum fill patterns per preset
• 16 steps per each drum pattern, with ability to add 16 "backbeat" steps between main steps (32 steps per drum pattern in total)
• patterns can be chained together to create more complex patterns
• Swing and Flam features
• Total Accent part with adjustable total accent value can give you ability to "highlight" specific steps in your drum pattern
• new: step conditions for drum steps

Mixer Section:

• 2 mixer channels: Bassline and Drums
• Drive effect for each channel
• 2 send effect pedals: FX A and FX B
• 14 send effect types
• send effect can be routed to either master output, MFX or another send effect (FX A -> FX B), which allows to chain several effects one after another
• MFX pedal with 22 effect types to choose from
• FX A and FX B send amount knobs for each mixer channel
• XY-pad on each effect pedal to control their parameters
• Master Limiter effect to prevent sound clipping

and more:

• Unlimited number of user presets
• 84 factory presets
• Audio export to wav file (16, 24 or 32 bit)
• Preset / Bank Share function
• Selectable UI color schemes with ability to adjust colors manually
• Can work either as a standalone app, or as AUv3 audio unit plugin
• Designed for both iPad and iPhone

## Key features

- AUv3, Ableton Link, AudioBus, IAA support
- Classic bassline waveforms (Saw, Pulse)
- Distortion and filter LFO effects
- 32-step sequencer with pattern editing
- 16 independent drum parts with customizable sounds
- Realtime master effects with XY-pad

## Pricing and in-app purchases

Base price: $14.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ukrainian style color scheme | $4.99 | one-time |
| Ukrainian style app icon | $4.99 | one-time |


## Chart rankings

- #180 in Top Paid · Music (US App Store)

## What do users think of Pure Acid?

Overall sentiment: positive

**Pros**

- 🚀 Powerful and feature-rich
- 👍 Intuitive and easy to use
- 🎶 Excellent sound quality
- 🎛️ Great sequencing and programming capabilities
- 🔌 Seamless integration with other apps and hardware

**Cons**

- 🐛 Occasional audio cutoff or sync issues
- 🔍 Lack of detailed documentation or tutorials
- 🔀 Limitations in pattern length and drum sequencing

**Commonly reported bugs**

- GUI scaling issues on smaller devices
- Crashes or freezes on certain devices

**Most requested features**

- Ability to import MIDI files
- Standalone drum machine mode
- Expanded drum sample library
- Knob/parameter automation recording

## Recent user reviews (10 of 150)

All indexed reviews: https://appshunter.io/ios/app/pure-acid/id1481283602/reviews.md

### 5/5 — Fantastic

*2026-08-12*

I get a whole lot of fun out of this app! The controls take getting used to but what app doesn’t really? I know it defeats the purpose of the app but having more options both for drums and bass would be so awesome! I’d even buy a whole new app in a similar style to this for the ability to have more than one bass note at a time for chords or a rudimentary drum synthesizer for even more variety!

### 5/5 — Love it

*2026-06-20*

Nicely thought out design, a  solid foundation upon which to build acid

### 5/5 — Simply Stellar

*2026-06-09*

I’m a Rebirth user from 25 years ago. Moved away from  electronica, but have returned recently. I looked at many 303 apps on Mac, but none matched my memory of Rebirth (Phoscyon2 is pretty good though, but 10x the price of Pure Acid). Superb UI, great sounds, nice presets to jump start things. No annoying subscriptions, which I rarely acquiesce to. Great price. Just get it! Oh, and as always, Slava Ukraini! Since the war began, I’ve discovered that many of my favourite apps are written by Ukrainians. Hope to visit one day, once they kick the Orcs out.

### 5/5 — Audio Cutoff

*2026-05-08*

Hey my friend I love this app so much! Can you make it to where it doesn’t blowout/stop/cut off when trying to record on GarageBand when using Inter-App Audio especially and specifically when you’re getting into long recording sessions causing you to have to start your track all over constantly until it goes all the way through or if it’s loud. Ty my friend.

### 5/5 — Tolles Programm

*2026-04-12*

Fester Bestandteil in meinem Setup.

### 1/5 — Sch__ss Update!

*2026-01-09*

..hat mir meine ganzen Pattern zerhaun, verdammt!!

### 5/5 — 5/5

*2025-12-13*

Must-Have-App

### 5/5 — Best Acid Bass and Drum Machine App (or hardware)

*2025-11-23*

This app is feature rich, the joy is equally endless. Programming the original or the clones is not for the faint of heart. Pure Acid offers screen to create patterns as well as keys. So much to tweak, add fx to drums and bass, control the dry/wet and there are fx kill switches. The preset patterns are incredible. Better than anything I could make. Tweaking the parameters brings me a lot of joy. I have the Behringer TD3 & RD6. This app is way better. I have mapped to Novetion XL Control to have hardware engagement. Even without hardware mapping, it’s fantastic. Jim Audio is a fantastic designer. The depth of his passion for electronic music shows in the way this apps allow creativity. 
Highly recommend

### 5/5 — Best TB-303 App

*2025-11-22*

There’s so many things you can make with this app if you know how to program it, it has all the features you could want, my only suggestion is to add the drum samples of the TR-727 and LinnDrum, other than that this app is a masterpiece

### 5/5 — Born Again

*2025-08-23*

I was too late to get the Rebirth app before it was pulled, so I’ve been looking for something similar.  This app is an improvement over Rebirth in many ways, especially in how it modernizes the programming process.

I was wondering how the included examples got the sweeping effect, as you cannot record knob movements.  The method here is to use the LFO.  Set it at a low rate and it will give a nice sweeping effect to the bass line.

Also included are conditionals to do things like having a crash cymbal only sound on the first of four times a pattern plays (1:4).  Couldn’t find that covered online, so it took me a while to figure that out.

This app is VERY well designed.

## Frequently asked questions about Pure Acid

### What is Pure Acid?

Pure Acid is a mobile application that functions as a high-quality bassline synthesizer and drum machine. It is inspired by classic 1980s hardware synthesizers and rhythm machines, offering a retro analog sound with modern enhancements for music creation.

### What are the key features of Pure Acid?

Key features include support for AUv3, Ableton Link, AudioBus, and IAA, classic bassline waveforms (Saw and Pulse), a distortion effect, a filter LFO, a 32-step sequencer with advanced pattern editing, and 16 independent drum parts with customizable sounds. It also includes realtime master effects with XY-pad controls.

### How much does Pure Acid cost?

The application is available for free with in-app purchases. This model allows users to explore the core functionality without initial cost, with options to unlock additional features or content through purchases.

### What music genres can I create with Pure Acid?

Pure Acid is well-suited for creating music in genres such as Acid House, Techno, Hardcore, and Big Beat. The app comes with a large number of factory preset patterns designed to immerse users in these exciting musical worlds and inspire their own compositions.

### Can I use Pure Acid with other music apps?

Yes, Pure Acid supports integration with other music applications. It is compatible with AUv3, Ableton Link, AudioBus, AUM, and other IAA-supporting apps, allowing for complex sound setups and synchronization with your existing music gear.

## Version history (last 5 releases)

### 1.5.6 — 2026-07-05

In the standalone app:
- improved compatibility with new iPad display resolutions and aspect ratios. Now the app's interface adjusts to any screen size automatically;
- implemented portrait orientation mode support (for iPad) to comply with the new iPadOS 26 requirements. In the portrait mode, all 4 module racks are visible simultaneously on the screen together with the onscreen keyboard;
- graphics refresh rate increased to 120 FPS (where available);
- minor bug fixes.

### 1.5.5 — 2026-01-05

- fixed: drum solo/mutes were ignored when triggering drums from Midi Input, both standalone app and AVu3;
- fixed: UI graphics bug, appeared on iPad mini (standalone app);
- app age ratings info has been updated as required by the App Store;
- minor bug fixes.

### 1.5.4 — 2023-03-30

- Fixed: Ableton Link was not working in the network between Ableton Live and Pure Acid on the newest iOS versions;
- AUv3: Midi In Channel settings bug fixed. Previously, audio units always had [Bass: Any, Drums: 10] Midi In channel setting. Now it corresponds to what you set in the standalone's global Midi In Channel settings (Settings menu);
- now you can Paste a bassline (or drums) pattern into a new pattern slot during playback right before jumping to that slot. It is helpful during live playback if you want to create several bassline (or drums) patterns by copying one to another without interrupting the playback. All you have to do is tap the destination pattern slot, and then quickly tap the Paste button right before the cursor jumps to that pattern slot.

### 1.5.3 — 2022-04-21

In this update:
- minor bug fix that could cause standalone app to crash upon start on devices with iOS 12 and earlier;

In previous update 1.5.2:
- added new Ukrainian style color scheme (In-App purchase) in the standalone app's Main Menu -> Support Ukraine;
- added ability to change app's icon to Ukrainian color style (In-App purchase);
- Ableton Link and AudioBus support updated to the newest versions.

### 1.5.2 — 2022-04-15

In the standalone Pure Acid app (Main Menu -> Support Ukraine):
- added new Ukrainian style color scheme (In-App purchase);
- added ability to change app's icon to Ukrainian color style (In-App purchase);
- Ableton Link and AudioBus support updated to the newest versions.

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## More apps by Dmitrij Pavlov

- [Electronika PRO](https://appshunter.io/ios/app/electronika-pro/id591764200)
- [Mr. Doodle!](https://appshunter.io/ios/app/mr-doodle/id1025721338)
- [Poison-202 Vintage Synthesizer](https://appshunter.io/ios/app/poison-202-vintage-synthesizer/id1145895278)
- [Groove Rider GR-16](https://appshunter.io/ios/app/groove-rider-gr-16/id1318750537)
- [Groove Rider 2](https://appshunter.io/ios/app/groove-rider-2/id6480135731)

All apps by Dmitrij Pavlov: https://appshunter.io/developer/478154322

## Related topics

[acid](https://appshunter.io/ios/topics/acid) · [808 tr](https://appshunter.io/ios/topics/808-tr)

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*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 2026-08-25.*