# StringLab vs ab Phaser X

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.

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.

## The numbers

| Metric | StringLab | ab Phaser X |
| --- | --- | --- |
| Price | $14.99 | **$5.99** |
| Rating | [4.3 (14 ratings)](https://appshunter.io/ios/app/stringlab/id6461312318/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ab-phaser-x/id6469461420/reviews)** |
| Number of ratings | **14** | 5 |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 11 months |
| Monetization | Paid | Paid |
| Size | 45 MB | 8 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [4Pockets.com](https://appshunter.io/developer/370131860) | [Alejandro Cabrera Zuniga](https://appshunter.io/developer/1660382836) |

## What reviewers say

### StringLab

[App page](https://appshunter.io/ios/app/stringlab/id6461312318)

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.

**Highlights:** 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

**In-app purchases:** none


### ab Phaser X

[App page](https://appshunter.io/ios/app/ab-phaser-x/id6469461420)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is StringLab free?

StringLab costs $14.99, with no in-app purchases.

### Is ab Phaser X free?

ab Phaser X costs $5.99, with no in-app purchases.

### Which has better reviews, StringLab or ab Phaser X?

ab Phaser X is rated higher. StringLab averages 4.3 out of 5 from 14 ratings, while ab Phaser X averages 5.0 from 5 ratings.

### Do StringLab or ab Phaser X have ads?

Neither StringLab nor ab Phaser X shows ads.

### Which is updated more often, StringLab or ab Phaser X?

StringLab ships an update every 10 days, and ab Phaser X every 11 months. Most recently, StringLab was updated on September 25, 2026 and ab Phaser X on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*