iMPC for iPhone vs OB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iMPC for iPhone
Transform your iPhone into a powerful music production studio. Create beats with over 600 samples, editable programs, and sequences. Record, overdub, and apply built-in effects for endless creative possibilities.
- Over 600 samples
- 47 editable programs
- 80 editable sequences
- Built-in sampler with mic, line-in, and turntable recording
- Built-in effects (delay, bit crusher, compressor)
- Export to MPC Software and share to social media
- 16 Levels mode and Note Variation slider
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Turn your iPhone into an MPC with more than 600 samples, 47 editable programs, 80 editable sequences, and iconic MPC workflow. Need help? Have an issue or question? Please email us at support@retronyms.com. iMPC brings the look and feel of the classic Akai Pro MPC to your iPhone. iMPC includes everything you need to create a beat quickly and easily. With features including built-in effects, plus the ability to create new sequences and record and overdub beats, the possibilities are endless. The app’s built-in sampler can record samples three different ways: using the mic on the iPhone, using the line input on the iPhone, or using the multi-touch turntable interface in iMPC to record samples directly from iTunes or other music libraries. - Exclusive iMPC sound set and classic Akai Professional sound library - "3D Perform" controls -- use your iPhone's motion sensors to control parameters - Export tracks to MPC Software for use with MPC Renaissance and MPC Studio - Share on SoundCloud, Facebook, Twitter, Tumblr, or export to your computer - 16 Levels mode: 16 levels of attack, velocity, length, and tuning - Note Variation slider: adjust attack, velocity, length, and tuning as you play - Trim and categorize samples, undo takes and erase samples - Create new sequences, record and overdub beats - Live Sequence queuing for real-time performance and playback - Simple drag and drop program creation - Effects include delay, bit crusher, master compressor/limiter - Time correct: 1/8 note - 1/32T with variable swing - Note Repeat: 1/8 note - 1/32T timing, with latch - AudioCopy beats and sequences to compatible apps - AudioPaste samples from hundreds of compatible apps
OB
This app emulates the classic Oberheim OB-X synthesizer, offering its rich sound and behavior with added enhancements. It focuses on sonic quality and includes micro random detuning for authentic analog warmth. External effects are recommended to further shape its versatile soundscapes.
- Oberheim OB-X emulation
- Recreates original sound and behavior
- Added enhancements to original design
- Micro random detuning
- Rich and good sound quality
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OB-Xd is based on the Oberheim OB-X. It attempts to recreate its sound and behavior, but as the original was very limited in some important ways, a number of things were added or altered to the original design. OB-Xd was designed to sound as good and as rich as the original. It implements micro random detuning. Also, like many synths of the OB-X's generation, the OB-Xd has no internal effects so its sounds and textures can be greatly enhanced by the use of additional processing like chorus, reverb, delay, etc.
Screenshots
Verdict
The clearest difference is rating: OB at 4.4 against iMPC for iPhone's 2.8. OB also leads on review sentiment (57% vs 35%) and update cadence (every 2 months vs every 6 months). iMPC for iPhone's advantage is price ($6.99 vs $14.99) and chart position (#176 vs unranked). On ratings volume, ads, in-app purchases and device support 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
iMPC for iPhone costs $6.99 and OB $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OB holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 84 and 65 respectively. Written reviews point the same way: 35% of iMPC for iPhone's written reviews are positive against 57% of OB's.
iMPC for iPhone ships an update every 6 months, OB every 2 months. Both last shipped on October 15, 2026.
| Parameter | iMPC for iPhone | OB |
|---|---|---|
| Price | $6.99 — better | $14.99 |
| Rating | 2.8 (84 ratings) | 4.4 (65 ratings) — better |
| Positive reviews | 35.0% of reviews | 57.0% of reviews — better |
| Number of ratings | 84 — better | 65 |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #176 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 79 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Akai Professional | DiscoDSP LLC |
Customer experience
iMPC for iPhone
OB
User reviews
iMPC for iPhone
From 84 App Store ratingsWhat we love
- 🚀 Classic MPC feel
- 👍 Intuitive interface
- 🎨 Good sound quality
- 💰 Affordable price
Room to improve
- 🐛 Frequent crashes
- 🔀 Unreliable sample playback
- 🚫 Inability to delete samples
- 🤖 Outdated and unresponsive UI
OB
From 65 App Store ratingsWhat we love
- 🎶 Incredible sound quality
- ✨ Inspiring creative tool
- 🎹 Faithful emulation of classic synth
- 🎛️ Great for programming
- 🎚️ Useful presets
Room to improve
- 🐛 Unusable UI on older devices
- 💻 Poor GUI scaling on iPad Pro
- 🎛️ Controls unresponsive or misaligned
- 📉 Limited functionality without updates
- 🤷♂️ No clear upgrade path
Bugs and requests
iMPC for iPhone
Reported bugs
3 issues- Crashes when editing samples
- Playback issues with iOS 9 and later
- Bluetooth connectivity problems
Requested features
4 requests- Add song mode to link sequences
- Implement Audiobus support
- Improve sample chopping and editing
- Allow importing samples from cloud storage
OB
Reported bugs
13 issues- Crashes in Audiobus
- Cannot use in MIDI section of Audiobus
- Preset browser issues (scrolling, cut off banks)
- Automation bug with cutoff freq
- UI issues on iPad Pro (buttons misaligned, text cut off)
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- App suspends on iOS 14
- No virtual keyboard in standalone app
- AUv3 crashes when adding second instance
- UI messed up in AU
- Knobs don't line up with display
- Wonky controls
- Programmer page without menu, cannot save/open patches
- LFOing filter cutoff jerky
Requested features
19 requests- Add last/high priority for mono patches
- Increase polyphony to 8 voices
- MIDI Learn functionality
- Preset browser improvements (categories, scrolling)
- Adjustable keyboard size
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- GUI scaling/layout redesign for iPhone
- Skins for GUI
- MIDI keyboard in standalone mode
- Effects
- Preset manager
- Zoom functionality for AUv3 on iPhone
- Fix knob turning bugs
- Add patch select in DAW apps
- GUI color scheme options
- Manual in settings
- Import presets
- Layering sounds (like original OBXa)
- White pinstripes on blue background (cosmetic)
- Mod wheel customization
In-app purchases
iMPC for iPhone
No in-app purchases
OB
No in-app purchases









