# moodunits vs StringLab

The clearest difference is price: moodunits at $2.99 against StringLab's $14.99. moodunits also leads on review sentiment (92% vs 57%) and rating (4.5 vs 4.3). StringLab's advantage is in-app purchases (none vs 12). On ads, device support and iOS requirement there is nothing between them.

moodunits costs $2.99 and StringLab $14.99 up front. moodunits sells 12 one-off in-app purchases. StringLab asks for nothing beyond the download.

moodunits holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 48 and 14 respectively. Written reviews point the same way: 92% of moodunits's written reviews are positive against 57% of StringLab's.

moodunits ships an update every 5 days, StringLab every 10 days. The most recent releases landed on September 7, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | moodunits | StringLab |
| --- | --- | --- |
| Price | **$2.99** | $14.99 |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/moodunits/id1521447619/reviews)** | [4.3 (14 ratings)](https://appshunter.io/ios/app/stringlab/id6461312318/reviews) |
| Number of ratings | **48** | 14 |
| Positive reviews | **92.3% of reviews** | 57.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 10 days |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#193** | — |
| Size | 23 MB | 45 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rob Jackson](https://appshunter.io/developer/1072346998) | [4Pockets.com](https://appshunter.io/developer/370131860) |

## What reviewers say

### moodunits

[App page](https://appshunter.io/ios/app/moodunits/id1521447619)

**Currently charting:** #193 Top Paid · Music (US App Store)

This app provides a collection of instrument and effect Audio Units for music production. It is not a standalone application but integrates with AUv3 compatible hosts like GarageBand and AUM on iOS devices.

**Highlights:** Sample-based instrument (Waverley), 30 factory sounds with tweakable parameters, Basic audio effects (delay, reverb, EQ, etc.), Light on CPU usage, Access to PDF user guide, MU Store for additional downloads

**Features:** Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MU Waverley Mobass | Free | one-time |
| MU Waverley Factory | Free | one-time |
| MU Waverley Scapers | Free | one-time |
| MU Waverley MegaPortaPad | Free | one-time |
| MU Waverley ARC | Free | one-time |
| MU Waverley ESC | Free | one-time |
| MU Waverley GRANALOG | Free | one-time |
| MU Waverley Stringz | $0.99 | one-time |
| MU Waverley Mellopiano | $0.99 | one-time |
| MU Waverley Pianoatmos | $0.99 | one-time |
| MU Waverley ATMOSPADZ | $0.99 | one-time |
| MU Waverley Evoebo | $0.99 | one-time |


### 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


## Frequently asked questions

### Is moodunits free?

moodunits costs $2.99, and also offers in-app purchases.

### Is StringLab free?

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

### Which has better reviews, moodunits or StringLab?

moodunits is rated higher. moodunits averages 4.5 out of 5 from 48 ratings, while StringLab averages 4.3 from 14 ratings.

### Do moodunits or StringLab have ads?

Neither moodunits nor StringLab shows ads.

### Which is updated more often, moodunits or StringLab?

moodunits ships an update every 5 days, and StringLab every 10 days. Most recently, moodunits was updated on September 7, 2026 and StringLab on September 21, 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.*