# iMPC for iPhone vs OB

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 iOS requirement (8.0 vs 15.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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.

## The numbers

| Metric | iMPC for iPhone | OB |
| --- | --- | --- |
| Price | **$6.99** | $14.99 |
| Rating | [2.8 (84 ratings)](https://appshunter.io/ios/app/impc-for-iphone/id677356259/reviews) | **[4.4 (65 ratings)](https://appshunter.io/ios/app/ob-xd-auv3-synth/id1465262829/reviews)** |
| Number of ratings | **84** | 65 |
| Positive reviews | 35.0% of reviews | **57.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 79 MB | 25 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Akai Professional](https://appshunter.io/developer/373969727) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### iMPC for iPhone

[App page](https://appshunter.io/ios/app/impc-for-iphone/id677356259)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Classic MPC feel
- 👍 Intuitive interface
- 🎨 Good sound quality
- 💰 Affordable price

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔀 Unreliable sample playback
- 🚫 Inability to delete samples
- 🤖 Outdated and unresponsive UI

**Reported bugs**

- Crashes when editing samples
- Playback issues with iOS 9 and later
- Bluetooth connectivity problems

**Requested features**

- Add song mode to link sequences
- Implement Audiobus support
- Improve sample chopping and editing
- Allow importing samples from cloud storage


### OB

[App page](https://appshunter.io/ios/app/ob-xd-auv3-synth/id1465262829)

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.

**Highlights:** Oberheim OB-X emulation, Recreates original sound and behavior, Added enhancements to original design, Micro random detuning, Rich and good sound quality

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🎶 Incredible sound quality
- ✨ Inspiring creative tool
- 🎹 Faithful emulation of classic synth
- 🎛️ Great for programming
- 🎚️ Useful presets

**What reviewers complain about**

- 🐛 Unusable UI on older devices
- 💻 Poor GUI scaling on iPad Pro
- 🎛️ Controls unresponsive or misaligned
- 📉 Limited functionality without updates
- 🤷‍♂️ No clear upgrade path

**Reported bugs**

- 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)

**Requested features**

- Add last/high priority for mono patches
- Increase polyphony to 8 voices
- MIDI Learn functionality
- Preset browser improvements (categories, scrolling)
- Adjustable keyboard size


## Frequently asked questions

### Is iMPC for iPhone free?

iMPC for iPhone costs $6.99, with no in-app purchases.

### Is OB free?

OB costs $14.99, with no in-app purchases.

### Which has better reviews, iMPC for iPhone or OB?

OB is rated higher. iMPC for iPhone averages 2.8 out of 5 from 84 ratings, while OB averages 4.4 from 65 ratings.

### Do iMPC for iPhone or OB have ads?

Neither iMPC for iPhone nor OB shows ads.

### Which is updated more often, iMPC for iPhone or OB?

iMPC for iPhone ships an update every 6 months, and OB every 2 months. Most recently, iMPC for iPhone was updated on October 15, 2026 and OB on October 15, 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.*