# 2XB303 Acid Bass Loop Maker vs Poly 2

The clearest difference is price: Poly 2 at Free against 2XB303 Acid Bass Loop Maker's $3.99. Poly 2 also leads on review sentiment (84% vs 67%) and ratings volume (695 vs 58). 2XB303 Acid Bass Loop Maker's advantage is in-app purchases (none vs 1) and update cadence (every 10 days vs every 4 weeks). On rating, ads, device support and iOS requirement there is nothing between them.

Poly 2 is free to download; 2XB303 Acid Bass Loop Maker costs $3.99 up front. Poly 2 sells 1 one-off in-app purchase. 2XB303 Acid Bass Loop Maker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for 2XB303 Acid Bass Loop Maker against 4.8 for Poly 2. That said, the two scores are not equally well evidenced: Poly 2 has 695 ratings behind it against 58, so its average is the more settled of the two. Written reviews are what separate them: 67% of 2XB303 Acid Bass Loop Maker's written reviews are positive against 84% of Poly 2's.

2XB303 Acid Bass Loop Maker ships an update every 10 days, Poly 2 every 4 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 2XB303 Acid Bass Loop Maker | Poly 2 |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.7 (58 ratings)](https://appshunter.io/ios/app/2xb303-acid-bass-loop-maker/id1288067698/reviews) | **[4.8 (695 ratings)](https://appshunter.io/ios/app/poly-2/id1477029326/reviews)** |
| Number of ratings | 58 | **695** |
| Positive reviews | 66.7% of reviews | **84.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 16 MB | 153 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rob Wilmot](https://appshunter.io/developer/520672432) | [James Milton](https://appshunter.io/developer/581503621) |

## What reviewers say

### 2XB303 Acid Bass Loop Maker

[App page](https://appshunter.io/ios/app/2xb303-acid-bass-loop-maker/id1288067698)

Create electro melodies and acid techno basslines with this creative bass synth sequencer. Features live control for triggering sequences and synth pads, random generation, and extensive sound shaping options. Export your audio loops easily.

**Highlights:** Bass synth sequencer, Live control for sequences and pads, Audio loop recording and export, Random sequence generation, Tweakable synth parameters, MIDI and Ableton Link syncing, Global effects: Overdrive, Compression, Echo

**Features:** Vision Pro support

**In-app purchases:** none


### Poly 2

[App page](https://appshunter.io/ios/app/poly-2/id1477029326)

This app generates evolving musical patterns and melodies using polyrhythms. It offers extensive sound manipulation with a sampler, multiple effects, and the ability to store numerous configurations. Users can also import their own sounds and integrate with other music production tools.

**Highlights:** Generative polyrhythm sequencing, Up to 8 simultaneous sounds, Sampler with envelopes and filters, Randomize capabilities, Built-in delay, reverb, distortion, and EQ FX, AUv3, Audiobus, and IAA support, Import custom samples

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro mode | $11.99 | one-time |

**What reviewers like**

- 🚀 Unique, creative, and powerful tool
- 👍 Intuitive and user-friendly interface
- 🎨 Excellent for ambient, experimental, and generative music
- 🎹 Great for drum grooves and rhythmic patterns
- 💻 Seamless integration with external hardware and software

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔇 Lack of sustain/voice ring-out when transport is stopped
- 📺 Small interface elements can be difficult to use on iPad
- 🔌 Compatibility issues with some third-party apps

**Reported bugs**

- In-app purchase not working for some users
- MIDI connectivity issues with certain apps
- Crashes upon opening for some users

**Requested features**

- Ability to preview samples before importing
- Autoslice/autochop functionality for samples
- Support for larger sample imports and automatic slot filling
- Granulizer effect
- Note repeat and vinyl effects


## Frequently asked questions

### Is 2XB303 Acid Bass Loop Maker free?

2XB303 Acid Bass Loop Maker costs $3.99, with no in-app purchases.

### Is Poly 2 free?

Poly 2 is free to download, with in-app purchases available.

### Which has better reviews, 2XB303 Acid Bass Loop Maker or Poly 2?

Poly 2 is rated higher. 2XB303 Acid Bass Loop Maker averages 4.7 out of 5 from 58 ratings, while Poly 2 averages 4.8 from 695 ratings.

### Do 2XB303 Acid Bass Loop Maker or Poly 2 have ads?

Neither 2XB303 Acid Bass Loop Maker nor Poly 2 shows ads.

### Which is updated more often, 2XB303 Acid Bass Loop Maker or Poly 2?

2XB303 Acid Bass Loop Maker ships an update every 10 days, and Poly 2 every 4 weeks. Most recently, 2XB303 Acid Bass Loop Maker was updated on October 23, 2026 and Poly 2 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.*