StringLab vs ab Phaser X
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
ab Phaser X
This music app offers a versatile phase modulator with 2 to 12 stages. Customize sweeps with controls for rate, depth, frequency, and feedback. Adjust loudness and blend for your final sound.
- 2 to 12 stage phase modulation
- Rate control (DAW sync or 0.001Hz-10Hz)
- Depth, Frequency, and Feedback controls
- Gain and Mix controls for loudness and blend
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'ab Phaser X' is a phase modulator featuring from 2 to 12 stages. With 'ab Phaser X' you can control the rate of your phase, whether it's synced to your DAW's BPM or freely from 0,001Hz all the way to 10Hz. Depth, Frequency and Feedback controls help you customise your phase sweeps further and finally, a Gain and Mix control will allow you to control the loudness and the blend of the final Phaser.
Screenshots
Verdict
The clearest difference is rating: ab Phaser X at 5.0 against StringLab's 4.3. ab Phaser X also leads on price ($5.99 vs $14.99). StringLab's advantage is update cadence (every 10 days vs every 11 months). On ratings volume, ads, in-app purchases and monetization model 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
StringLab costs $14.99 and ab Phaser X $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ab Phaser X holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 14 and 5 respectively.
StringLab ships an update every 10 days, ab Phaser X every 11 months. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.
| Parameter | StringLab | ab Phaser X |
|---|---|---|
| Price | $14.99 | $5.99 — better |
| Rating | 4.3 (14 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 14 — better | 5 |
| Update frequency | Every 10 days — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Alejandro Cabrera Zuniga |
Customer experience
StringLab
ab Phaser X
In-app purchases
StringLab
No in-app purchases
ab Phaser X
No in-app purchases
Questions
Is StringLab free?
Is ab Phaser X free?
Which has better reviews, StringLab or ab Phaser X?
Do StringLab or ab Phaser X have ads?
Which is updated more often, StringLab or ab Phaser X?
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