OB vs Lagrange
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Lagrange
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.
- AUv3-compatible synthesizer
- Simplified sound creation
- Oscillator algorithms
- Quick sound selection
- Hybrid synthesis
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Lagrange is an AUv3-compatible synthesizer designed to simplify sound creation by concealing complex parameter adjustments within oscillator algorithms. Rather than emphasizing precise sound design, this synthesizer prioritizes selecting the right oscillator type to quickly achieve the sound that suits your needs. For more detailed information about the product, please visit the website. The website offers detailed product descriptions, manuals and videos, as well as important notices. https://icegear.net/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OB | Lagrange |
|---|---|---|
| Price | $14.99 | $8.00 — better |
| Rating | 4.3 (64 ratings) | 4.8 (57 ratings) — better |
| Positive reviews | 57.0% of reviews | 95.5% of reviews — better |
| Number of ratings | 64 — better | 57 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | DiscoDSP LLC | iceWorks, Inc. |
Customer experience
OB
Lagrange
Bugs and requests
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
Show 14 moreShow fewer
- 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
Lagrange
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OB
No in-app purchases
Lagrange
No in-app purchases
