Comparison

iMPC for iPhone vs OB

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Currently charting
Read full description

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

About

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.

Highlights
  • Oberheim OB-X emulation
  • Recreates original sound and behavior
  • Added enhancements to original design
  • Micro random detuning
  • Rich and good sound quality
Features
Read full description

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

iMPC for iPhone4 screens
OB1 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

iMPC for iPhone ships an update every 6 months, OB every 2 months. Both last shipped on October 15, 2026.

Scorecard7 real differences · 4 level
iMPC for iPhone versus OB: the parameters behind the verdict, then further details
ParameteriMPC for iPhoneOB
Price$6.99 — better$14.99
Rating2.8 (84 ratings)4.4 (65 ratings) — better
Positive reviews35.0% of reviews57.0% of reviews — better
Number of ratings84 — better65
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#176 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better15.0
Further details — not scored
Size79 MB25 MB
Age rating4+4+
DeveloperAkai ProfessionalDiscoDSP LLC

Customer experience

iMPC for iPhone

All ratings84 ratings
Positive36.9%
Neutral16.7%
Negative46.4%
Written reviews246 reviews
Positive35.0%
Neutral15.0%
Negative50.0%

OB

All ratings65 ratings
Positive84.6%
Neutral4.6%
Negative10.8%
Written reviews86 reviews
Positive57.0%
Neutral12.8%
Negative30.2%

User reviews

iMPC for iPhone

From 84 App Store ratings

What 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 ratings

What 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)
Show 8 more
  • 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
Show 14 more
  • 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

None

iMPC for iPhone

No in-app purchases

None

OB

No in-app purchases

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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