strng vs WoodTroller
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
strng
This app generates plucked string sounds using a physical modeling synthesis engine. It offers polyphonic voices, a built-in keyboard, and MIDI control. Shape your sound with delay and resonant filters, and integrate with other music apps.
- Physical modeling string synthesis
- 16 voice polyphony
- Built-in 25-key keyboard with aftertouch
- MIDI controller support (USB/Wi-Fi)
- Stereo ping-pong delay
- Two-channel resonant filter with LFOs
- Audiobus, IAA, and AUv3 support
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Strng is a string synthesiser inspired by the karplus-strong algorithm. The physical modelling starts with a short burst of noise that then guided by a tuned delay buffer and string tension filter, generates plucked string like sounds. No samples are used. Strng is 16 voice polyphonic and can be controlled with an in app 25 key chromatic keyboard or connect prefered midi controller through USB or Wifi. To further shape the sound two post effects are available, a ping-pong stereo delay and two channel resonant filter controlled by two LFOs. Connect to other apps through AudioBus, inter app audio or load in DAWs as AUv3. +++ String synthesis engine +++ 16 voice polyphonic +++ Audiobus, IAA and AUv3 +++ Core MIDI, bluetooth midi and limited MPE +++ 25 multitouch keyboard with aftertouch control +++ Factory presets, save and load your own settings, drag'n drop from files app +++ Aftertouch modulation for attack, sustain, bit crush, resonant filter and detune lfo +++ Stereo ping-pong delay +++ Two channel resonant low pass filter LFOs
WoodTroller
This app functions as a multi-touch bar MIDI controller for MPE and MIDI V2. It offers customizable rotary controls and buttons to manage various parameters and send MIDI commands, with iCloud syncing for presets.
- MPE touch bar with individual pitch shift, pressure, and CC74 control
- 8 customizable rotary controls for sending multiple CC messages
- 8 programmable buttons for sending various MIDI commands
- User-definable rotary and button names, colors, and ranges
- Preset storage and automatic syncing via iCloud
- Stand-alone app and AUv3 plugin support
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WoodTroller is NOT an app to annoy people. It’s an MPE and midi V2 multi touch bar keyboard and midi controller : The MPE touch bar supports multiple notes with individual pitch shift (horizontal movement), pressure and cc74 (vertical movement). WoodTroller has 8 general purpose rotary controls : - Each can send 6 different CC messages to different channels. - Each of the 6 command values can be mapped differently to the full rotary range. - So 1 rotary can control several parameters on the same or on different instruments. - Rotary names, colour, unit, range can all be user set. WoodTroller also has 8 general purpose on-off or push buttons : - Each button can send up to 8 different midi commands (CC, PC, NoteOn, …) to different channels. - This allows to quickly switch multiple midi instruments or devices to another program or to other settings. - Each midi command’s data value can be auto incremented/decremented. - All button names, colour, type can be user set. All settings can be stored in presets in iCloud which yield automatic preset syncing between several WoodTrollers on different devices. WoodTroller is available as stand-alone app and as AUv3 plugin.
Screenshots
Verdict
The clearest difference is update cadence: WoodTroller at fortnightly against strng's every 4 months. WoodTroller also leads on review sentiment (100% vs 84%). strng's advantage is price ($4.99 vs $9.99) and ratings volume (35 vs 6). On rating, 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
strng costs $4.99 and WoodTroller $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.7 for strng against 4.8 for WoodTroller. That said, the two scores are not equally well evidenced: strng has 35 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 84% of strng's written reviews are positive against 100% of WoodTroller's.
strng ships an update every 4 months, WoodTroller fortnightly. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.
| Parameter | strng | WoodTroller |
|---|---|---|
| Price | $4.99 — better | $9.99 |
| Rating | 4.7 (35 ratings) | 4.8 (6 ratings) — better |
| Positive reviews | 84.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 35 — better | 6 |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPad, Mac |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 4 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Sigth | Woodman's Immaculate Maple Syrup Studio |
Customer experience
strng
WoodTroller
In-app purchases
strng
No in-app purchases
WoodTroller
No in-app purchases









