FAC Maxima vs StringLab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FAC Maxima
This audio effect provides automatic gain control to keep audio levels consistent and prevent clipping. It offers both transparent signal boosting and significant level maximization with creative colorization. The app is versatile for mastering, individual tracks, and broadcasting applications.
- Automatic gain control
- Level maximization
- Transparent signal boost
- Creative colorization
- Mastering tool
- Individual track processing
- Real-time multi-waveform graph
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FAC Maxima is an audio effect designed to provide automatic gain control of your audio materials to ensure that the levels stay consistent and never exceed 0dB. It's a clever combination of dynamic processors that can be set to provide a gentle transparent signal boost respecting the initial dynamic or significant colorised level maximisation. Thanks to a unique signal path, algorithms and a small set of parameters, FAC Maxima makes a complicated task easy. In addition to the classic final stage application, FAC Maxima excels on individual tracks too. With a few changes it's easy to go from the common gain deviation compensation, e.g. for vocals, to drastical audio changes that will bring your audio material to new territories: boost reverb tails, flattenize drums… The applications are various and the possibilities are limitless. • Get the final touch! FAC Maxima definitely makes audio louder and that makes it an effective tool in many mastering engineers’ arsenals. • Be creative! Emphasis subtitle details, sometimes floor contains treasure, you will have a completely new listen to your old tracks! The audio background may indeed contain noise, but sometimes also "pearls" that may be revealed. • Go further! Tired by the advertisement boost, or important speech level variation in broadcasting? Use FAC Maxima to maintain the level constant. DJ's may also benefit from the effects to normalise in real time the level of the mixed tracks. As with all FAC products the interface has a unique sober look and provides a great user experience. FAC Maxima also brings a real-time multi-waveform graph having a 6s buffer of the audio material before and after operations, this will help on setting the right parameters and have a visual feedback.
StringLab
This app is a digital synthesizer that uses physical string modeling to recreate the sounds of various instruments, particularly plucked or hammered strings. It allows users to explore acoustic physics and create unique instrument textures through extensive parameter experimentation.
- Karplus-Strong physical modeling
- Exciter Impact and Noise modes
- Resonator objects with feedback
- Frequency Dispersion support
- External live input
- Preset randomizer and manager
- Drag & Drop preset export
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StringLab is a physical string modeling synthesizer based on Karplus-Strong theory. It is capable of reproducing the sounds of many different types of instruments, but is especially useful in the reproduction of hammered or plucked strings and other types of percussive instruments. It works by passing carefully crafted waveforms and short bursts of white noise through a series of tuned delay lines. The delay lines have an internal feedback loop with a series of filters to mimic the natural decay of harmonics found in a real instrument. StringLab allows you to discover the character of real-world accoustics, exploring the physics of how materials interact. Many new and original textures are born out of experimenting with the settings, so don't be afraid to experiment and create your own unique and dynamic instruments. Features •Karplus Strong based physical modeling. •Exciter Impact with multiple modes. •Exciter Noise with many envelope driven filters. •2 resonator objects with feedback. •8 bands per object with inversion. •4 Coupling modes. •Supports Frequency Dispersion. •Feedback low/high Damping. •Per object Body Filter. •Pitch Deformity. •External live input mode. •Preset randomiser. •Build it Preset Manager & Favourites. •Search Presets. •Drag & Drop preset export of presets. •Supports Color Sets.
Screenshots
Verdict
The clearest difference is rating: FAC Maxima at 4.9 against StringLab's 4.3. FAC Maxima also leads on review sentiment (84% vs 57%) and price ($9.99 vs $14.99). StringLab's advantage is update cadence (every 10 days vs every 2 months). On ads, in-app purchases, monetization model 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
FAC Maxima costs $9.99 and StringLab $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FAC Maxima holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 67 and 14 respectively. Written reviews point the same way: 84% of FAC Maxima's written reviews are positive against 57% of StringLab's.
FAC Maxima ships an update every 2 months, StringLab every 10 days. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.
| Parameter | FAC Maxima | StringLab |
|---|---|---|
| Price | $9.99 — better | $14.99 |
| Rating | 4.9 (67 ratings) — better | 4.3 (14 ratings) |
| Positive reviews | 84.4% of reviews — better | 57.1% of reviews |
| Number of ratings | 67 — better | 14 |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 19 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederic Corvest | 4Pockets.com |
Customer experience
FAC Maxima
StringLab
In-app purchases
FAC Maxima
No in-app purchases
StringLab
No in-app purchases









