2XB303 Acid Bass Loop Maker vs Poly 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
2XB303 Acid Bass Loop Maker
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.
- 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
Read full descriptionHide full description
A creative bass synth sequencer for creating electro melodies or dirty phat & funky pure acid techno 303 style basslines. With LIVE CONTROL feature to trigger and transpose both sequences and new synth pad layer. Record and export your audio loops. Inspired by the acid house music scene. An IOS exclusive, compared to a modern equivalent to Rebirth (Rebirth was a popular tb - 303 clone a decade ago). Look at the video tutorial for a how-to guide. Listen to what you can create easily with 2XB303. Create electro, house, techno, edm or synth sequences using standard step functions as seen on various sequencers like the Roland SH 101 synthesizer. Built in pad layer than follows pitch. Transpose and trigger sequence even with MIDI Your synth sequences can also be generated randomly, shuffled or modify just notes. Easily capture whatever you hear and export to AudioShare, Audio-Copy, Email or iTunes Shared Folder. Support for Audiobus 3 routing, Ableton Link, IAA (Inter App Audio) Tweaking cut-off & decay Env-Mod & glide & accent etc for that classic sweet-spot acid growl Tap to dials to swipe up & down for fine adjustment of knobs. The sound was first compared to a Cyclone TT - 303 synthesizer & tweaked to extend sound shaping beyond a just bass maker. Waves have optional harmonic version, noise, LFO, glide speed & PHAT/ BASS, and great effects. This is designed to give pure electro music creativity beyond an acid synth 303 bass maker to create dynamically fluctuating overlaying electronic patterns. A good addition to any electro, drum and bass, acid, techno, house and any other EDM fans LIVE CONTROL feature: Use the keyboard for the following cool tricks: [Sequence/Control/Transpose]: Transpose both channels simultaneously while playing. Now ability to trigger sequence too, with synth pad layer. (optional and 22 sounds) [Sequence/Control/Pattern]: Instantly switch to a saved sequence while playing. Keys correspond to stored program numbers, starting from the current program thats loaded (key 1 is your current program, key 2 is current program+1). Highlighted keys show stored programs. This is great for building up live tracks, or instant crossfading between programs. You can also "Hold settings" so it locks settings like effects. MOD: LFO auto control low pass CUT-OFF and/or PITCH. The pitch level can give a vintage synthesiser effect subtly detuning with low SPEED or faster for chaotic random pitches. EFFECTS (Global/master are in yellow.) OVERDRIVE, COMPRESSION adjusts threshold, ratio, & gain. This is a global effect. ECHO tempo synced with feedback & wetness. SAVE ALL. When not playing, save to memory. SYNCING Ableton Link syncs with apps .Enable for precise timing without syncing. Press LINK button at the bottom for settings. MIDI sync with External, Virtual or Audiobus. 2XB 303 can be master or slave. ( any simple class-compliant USB should work but some may need to be power assisted) Virtual MIDI In is always on. If you send from another app AND receive MIDI clock then you will be receiving both MIDI CLOCKS. Choose only one unless you want double tempo (which can be interesting). While Ableton Link is enabled you can send clock. This means you can use one app to control 2XB303 synth alongside external hardware sequencers MIDI note data is sent out on each channel AUDIO Record a fixed length, default to 32 steps. Can be changed in settings. Arming the sampling with CAPTURE (flashing). Starts at counter 1 (ON). PLAY CAP to listen to your super cool sampled acid synthesiser loop. Audiobus 3 and IAA (Inter App Audio) Support. Route audio to mix or record into other applications Audio can be routed via IAA into apps like Apple's Garageband. Garageband will also sync your sequence for excellent multi-track recording. To save you press "Save all", it then flashes. Now choose destination ("!" means its occupied ) then press "Save All" to confirm.
Poly 2
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.
- 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
Read full descriptionHide full description
Poly 2 is a generative sequencer that creates evolving patterns and melodies based on the power of polyrhythms. Check out the promo video: https://youtu.be/ovCXtBynEkw Features: - Up to 8 different sounds at any time - Store up to 16 different configurations for each project - A sampler that includes envelopes, filters, loop crossfading, an LFO and more - Randomise capabilities - Delay, reverb, distortion and EQ FX - Over 100 samples included for free - 13 premade collections of sounds - 13 example projects - AUv3 support, both MIDI and Audio - Audiobus and IAA - Ableton Link - MIDI notes in / out, MIDI CC in / out and MIDI clock in - Import your own samples via iOS Files or WIFI transfer
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 2XB303 Acid Bass Loop Maker | Poly 2 |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.7 (58 ratings) | 4.8 (695 ratings) — better |
| Positive reviews | 66.7% of reviews | 84.4% of reviews — better |
| Number of ratings | 58 | 695 — better |
| Update frequency | Every 10 days — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.6 |
| Further details — not scored | ||
| Size | 16 MB | 153 MB |
| Age rating | 4+ | 4+ |
| Developer | Rob Wilmot | James Milton |
Customer experience
2XB303 Acid Bass Loop Maker
Poly 2
Bugs and requests
2XB303 Acid Bass Loop Maker
Not enough reviews yet to summarise bugs or requests.
Poly 2
Reported bugs
3 issues- In-app purchase not working for some users
- MIDI connectivity issues with certain apps
- Crashes upon opening for some users
Requested features
8 requests- 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
Show 3 moreShow fewer
- More built-in effects and processing options
- Ability to create and arrange full songs
- M1 Mac compatibility
In-app purchases
2XB303 Acid Bass Loop Maker
No in-app purchases
Poly 2
- Pro mode$11.99
Questions
Is 2XB303 Acid Bass Loop Maker free?
Is Poly 2 free?
Which has better reviews, 2XB303 Acid Bass Loop Maker or Poly 2?
Do 2XB303 Acid Bass Loop Maker or Poly 2 have ads?
Which is updated more often, 2XB303 Acid Bass Loop Maker or Poly 2?
Other comparisons















