Lorentz vs OB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lorentz
This app offers an analog-style synthesizer with a unique resonator for experimental sound design. Explore a wide range of sonic possibilities with familiar analog tones and innovative resonator effects.
- AUv3 compatibility
- Analog-style synthesis
- Integrated resonator
- Experimental sound creation
- Wide sound design possibilities
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Lorentz is an AUv3-compatible synthesizer that combines analog-style synthesis with a resonator. The resonator enables experimental sound creation using familiar analog-style tones, allowing you to explore a wide range of sound design possibilities. 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/
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 review sentiment: Lorentz at 90% against OB's 57%. Lorentz also leads on rating (4.8 vs 4.3) and price ($8.00 vs $14.99). On ratings volume, update cadence, ads and in-app purchases 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
Lorentz costs $8.00 and OB $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Lorentz holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 24 and 64 respectively. Written reviews point the same way: 90% of Lorentz's written reviews are positive against 57% of OB's.
Lorentz ships an update monthly, OB every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Lorentz | OB |
|---|---|---|
| Price | $8.00 — better | $14.99 |
| Rating | 4.8 (24 ratings) — better | 4.3 (64 ratings) |
| Positive reviews | 90.3% of reviews — better | 57.0% of reviews |
| Number of ratings | 24 | 64 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 7 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | iceWorks, Inc. | DiscoDSP LLC |
Customer experience
Lorentz
OB
Bugs and requests
Lorentz
Not enough reviews yet to summarise bugs or 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
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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
Lorentz
No in-app purchases
OB
No in-app purchases
