2XB303 Acid Bass Loop Maker vs Copperhead
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
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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.
Copperhead
This digital synthesizer plugin offers a vintage 80's sound with modern features like multi-note polyphony, an arpeggiator, and integrated audio effects. Design custom waveforms, explore various modulation options, and utilize a powerful sequencer to craft unique sounds.
- AUv3 compatible
- Multi-note polyphony
- Integrated arpeggiator
- Customizable waveforms
- Integrated audio effects
- 32-step sequencer
- Preset Manager
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Copperhead is an AUv3 digital subtractive synthesizer plugin which draws its influence from the vintage synthesizers of the early 80's. Only now we have multi-note polyphony, a build in arpeggiator, and a host of integrated audio effects. Copperhead features a custom String Machine, the ability to design your own custom waveforms, as well as supporting oscillator sync and various cross modulation effects. Cross modulation is a type of FM synthesis which can be used to morph simplistic waveforms into something far more aggressive and interesting. At the heart of Copperhead are its two oscillators, which support all your traditional waveforms (SINE,SQR,SAW,TRI), as well as SuperSaw, Trapezium, and other user definable types. The app features pulse width modulation and supersaw, as well as a customisable string engine and the ability to create your own oscillator types. The Voltage Controller Filter supports the usual LP, HP, BP and Notch filters in series or parallel configuration, as well as a couple of unusual ones like Formant which allows you to sweep your cutoff to create interesting vowel sounds. Copperhead also features twin LFO's with random and one shot functionality. It also supports Cross, Ring and FM modulators, in addition to low and high shelf filters. One of the great features is the integrated audio gate, which allows you to generate stuttering audio right out of the box. Combined with effects such as Chorus, Overdrive, Delay, Reverb and Auto Pan / Tremelo, and the ability to specify effect order, you have a lot of control over your sound. If that wasn't enough, we also include a 32 step sequencer, with various mono and poly modes with direct control control of various synth elements. We have a built in Preset Manager which groups presets into banks and groups, which supports drag and drop for easy import/export of presets. You can also access your favourites from a special popup menu, or via the built in quick search facility. Copperhead now ships with over 550 presets which cover just about every instrument category you would ever need. ○ AUv3 compatible. ○ Up to 16 note polyphony. ○ 7 Oscillator wave types. ○ Sub Oscillator. ○ PW/PWM on SQR and TRP waveforms. ○ Supports SuperSaw with MIX and DETUNE. ○ XMod / Ring and FM modulations. ○ Osc Sync. ○ 6 types of VCF filter. ○ Low and High shelf on output. ○ Built in compressor. ○ Chorus, Delay, Overdrive, Reverb and Auto Pan effects. ○ Built in Audio Gate. ○ Preset Manager with Bank/Group/Preset section. ○ Supports drag and drop to import/export presets, groups and banks. ○ Supports web transfer of presets. ○ 32 step arpeggiator. ○ More than 550 built-in presets. NOTE: This is an AUv3 plugin which was designed to be hosted in DAW's such as AUM, Cubasis, GarageBand, Loopy Pro etc.
Screenshots
Verdict
The clearest difference is price: 2XB303 Acid Bass Loop Maker at $3.99 against Copperhead's $14.99. 2XB303 Acid Bass Loop Maker also leads on update cadence (every 10 days vs monthly) and ratings volume (58 vs 18). Copperhead's advantage is review sentiment (83% vs 67%) and iOS requirement (13.0 vs 15.6). On rating, ads, in-app purchases and monetization model 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
2XB303 Acid Bass Loop Maker costs $3.99 and Copperhead $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.7 for 2XB303 Acid Bass Loop Maker against 4.7 for Copperhead. Both are backed by a comparable volume of ratings — 58 and 18 respectively. Written reviews are what separate them: 67% of 2XB303 Acid Bass Loop Maker's written reviews are positive against 83% of Copperhead's.
2XB303 Acid Bass Loop Maker ships an update every 10 days, Copperhead monthly. Both last shipped on November 3, 2026.
| Parameter | 2XB303 Acid Bass Loop Maker | Copperhead |
|---|---|---|
| Price | $3.99 — better | $14.99 |
| Rating | 4.7 (58 ratings) | 4.7 (18 ratings) — better |
| Positive reviews | 66.7% of reviews | 83.3% of reviews — better |
| Number of ratings | 58 — better | 18 |
| Update frequency | Every 10 days — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Rob Wilmot | 4Pockets.com |
Customer experience
2XB303 Acid Bass Loop Maker
Copperhead
Bugs and requests
2XB303 Acid Bass Loop Maker
Reported bugs
8 issues- No sound on some devices
- Metronome not syncing
- Pattern saving issues
- Crashes in AUM
- App crashes on startup (iPhone X)
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- Doesn't connect with AUX/Audiobus
- Instability and crashes
- MIDI clock send out issues
Requested features
14 requests- MIDI output for own synths
- More volume on mixer
- Tutorials for controls
- Save global modifications
- Improved sequencer for easier note entry
Show 9 moreShow fewer
- Better use of screen space
- MIDI learn for controls
- More organic sounds
- More instruction/manual
- AUv3 support
- Better DAW support
- Manual for saving patterns
- Tempo adjust in smaller increments
- Redesign app icon
Copperhead
Not enough reviews yet to summarise bugs or requests.
In-app purchases
2XB303 Acid Bass Loop Maker
No in-app purchases
Copperhead
No in-app purchases
Questions
Is 2XB303 Acid Bass Loop Maker free?
Is Copperhead free?
Which has better reviews, 2XB303 Acid Bass Loop Maker or Copperhead?
Do 2XB303 Acid Bass Loop Maker or Copperhead have ads?
Which is updated more often, 2XB303 Acid Bass Loop Maker or Copperhead?
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