OB vs L12X Solid State Amplifier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OB
This app recreates a classic vintage synthesizer, offering rich, full-bodied tones for electronic music, recordings, and film scores. It features MPE support, an on-screen MIDI keyboard, and high-quality rendering for enhanced music production.
- Oberheim OB-X emulation
- MPE support
- On-screen MIDI keyboard
- High-quality retina rendering
- AUv3 improvements
- Preset search with categories
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OB-Xd is a classic synthesizer that captivates musicians with its rich, full-bodied tones and expansive sound design. Perfect for adding a vintage touch to electronic tracks, live recordings, or film scores, OB-Xd brings unique and expressive qualities to your music. Designed to recreate the Oberheim OB-X, it features enhancements like micro random detuning and unison for a fuller sound. Elevate your studio setup and music production with OB-Xd today. • Full MPE support with configurable pitch bend, aftertouch, timbre, and pressure depth. • On-screen MIDI keyboard with pitch bend and mod wheels (iPad only). • Native iOS popups, dialogs, and text input throughout the interface. • Search Presets with category subfolders and native no-results dialog. • High-quality retina rendering. • AUv3 improvements: async file choosers, host viewport resize, and Bluetooth MIDI access.
L12X Solid State Amplifier
This app offers an analog simulation of a classic solid-state guitar amplifier, enhanced with extra channels and a contour knob for versatile tone shaping. It includes an integrated cabinet simulator with a high-quality impulse response for authentic sound.
- Analog simulation of Marshall Lead 12
- Clean and Metal channels
- Contour knob for tone shaping
- Boost overdrive stage
- Integrated Cab Simulator
- Marshall cabinet IR with Celestion V30
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L12X is an analog simulation inspired by the Marshall® Lead 12™ solid state amplifier of the late ‘80s. The original circuit has been modified by adding two additional channels (Clean and Metal), a Contour knob (to get a more scooped tone) and an additional Boost overdrive stage. An integrated Cab Simulator is loaded with a Marshall® cabinet IR featuring Celestion® V30 cones.
Screenshots
Verdict
The clearest difference is price: L12X Solid State Amplifier at Free against OB's $19.99. L12X Solid State Amplifier also leads on rating (4.4 vs 4.2). OB's advantage is review sentiment (75% vs 50%). 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
L12X Solid State Amplifier is free to download; OB costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
L12X Solid State Amplifier holds the better App Store score, 4.4 against 4.2. Both are backed by a comparable volume of ratings — 16 and 9 respectively. Written reviews complicate that: 75% of OB's written reviews are positive against 50% of L12X Solid State Amplifier's, so the app with the better star average is not the one people write more warmly about.
OB ships an update every 10 days, L12X Solid State Amplifier weekly. The most recent releases landed on September 20, 2026 and August 25, 2026 respectively.
| Parameter | OB | L12X Solid State Amplifier |
|---|---|---|
| Price | $19.99 | Free — better |
| Rating | 4.2 (16 ratings) | 4.4 (9 ratings) — better |
| Positive reviews | 75.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 16 — better | 9 |
| Update frequency | Every 10 days | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 210 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | DiscoDSP LLC | Audiority Srl |
Customer experience
OB
L12X Solid State Amplifier
In-app purchases
OB
No in-app purchases
L12X Solid State Amplifier
No in-app purchases
Questions
Is OB free?
Is L12X Solid State Amplifier free?
Which has better reviews, OB or L12X Solid State Amplifier?
Do OB or L12X Solid State Amplifier have ads?
Which is updated more often, OB or L12X Solid State Amplifier?
Other comparisons
