# OB vs Lagrange

The clearest difference is review sentiment: Lagrange at 95% against OB's 57%. Lagrange also leads on rating (4.8 vs 4.3) and price ($8.00 vs $14.99). On ratings volume, ads, in-app purchases and device support there is nothing between them.

OB costs $14.99 and Lagrange $8.00 up front. Neither carries in-app purchases, so what you see is what you pay.

Lagrange holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 64 and 57 respectively. Written reviews point the same way: 57% of OB's written reviews are positive against 95% of Lagrange's.

OB ships an update every 2 months, Lagrange every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | OB | Lagrange |
| --- | --- | --- |
| Price | $14.99 | **$8.00** |
| Rating | [4.3 (64 ratings)](https://appshunter.io/ios/app/ob-xd-auv3-synth/id1465262829/reviews) | **[4.8 (57 ratings)](https://appshunter.io/ios/app/lagrange-auv3-plug-in-synth/id1479000758/reviews)** |
| Number of ratings | **64** | 57 |
| Positive reviews | 57.0% of reviews | **95.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 25 MB | 8 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) | [iceWorks, Inc.](https://appshunter.io/developer/347507439) |

## What reviewers say

### 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


### Lagrange

[App page](https://appshunter.io/ios/app/lagrange-auv3-plug-in-synth/id1479000758)

This app is a hybrid synthesizer that simplifies sound creation by using oscillator algorithms to manage complex parameters. It focuses on quickly achieving desired sounds by selecting the appropriate oscillator type.

**Highlights:** AUv3-compatible synthesizer, Simplified sound creation, Oscillator algorithms, Quick sound selection, Hybrid synthesis

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

**In-app purchases:** none


## Frequently asked questions

### Is OB free?

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

### Is Lagrange free?

Lagrange costs $8.00, with no in-app purchases.

### Which has better reviews, OB or Lagrange?

Lagrange is rated higher. OB averages 4.3 out of 5 from 64 ratings, while Lagrange averages 4.8 from 57 ratings.

### Do OB or Lagrange have ads?

Neither OB nor Lagrange shows ads.

### Which is updated more often, OB or Lagrange?

OB ships an update every 2 months, and Lagrange every 2 weeks. Most recently, OB was updated on November 3, 2026 and Lagrange on November 3, 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.*