StringLab vs Wristrax
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.
Wristrax
Access and play your personal music library from your Apple Watch. Browse artists, albums, and playlists, then download and transfer tracks for offline listening without needing your phone.
- Offline Plex music playback
- Browse artists, albums, playlists
- Download tracks to phone
- Transfer music to Apple Watch
- Play music with connected AirPods
- Supports Play Now widget
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** Requires a Plex Media Server and a Plex account. Wristrax displays music from your own Plex library; no content is provided by the app. ** Plex and Plexamp are great. But what if you want to have your music on your Apple Watch? At the gym or while running, carrying your phone just to listen to music is not great. Wristrax finally brings offline playback to your Plex library. Browse artists, albums and playlists, download tracks to your phone, and transfer them to your Apple Watch. Here, you can browse your tracks and play them, for example with connected AirPods. Supports the Play Now widget. Files can be transcoded server-side for saving pace, or transferred as is. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Wristrax at Free against StringLab's $14.99. Wristrax also leads on rating (5.0 vs 4.3). StringLab's advantage is in-app purchases (none vs 2) and ratings volume (15 vs 1). On update cadence, ads 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
Wristrax is free to download; StringLab costs $14.99 up front. Wristrax sells 2 in-app purchases, starting at $8.99 per year. StringLab asks for nothing beyond the download.
Wristrax holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: StringLab has 15 ratings behind it against 1, so its average is the more settled of the two.
StringLab ships an update every 10 days, Wristrax weekly. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.
| Parameter | StringLab | Wristrax |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 4.3 (15 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 15 — better | 1 |
| Update frequency | Every 10 days | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 45 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | 4Pockets.com | Holger Schueler |
Customer experience
StringLab
Wristrax
In-app purchases
StringLab
No in-app purchases
Wristrax
- Annual Unlocked$8.991 Year
- Lifetime Unlimited$24.99









