# strng — string synthesis engine > Physical modeling string synthesis engine with polyphony and effects. (iPhone/iPad app by Erik Sigth.) - Source: https://appshunter.io/ios/app/strng/id993782289 (this page in markdown: same URL + `.md`) - Developer: [Erik Sigth](https://appshunter.io/developer/385275335) - Category: Music - Price: $4.99 - Rating: 4.70/5 from 35 App Store ratings · 32 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 4 MB - Languages: American English - Released: 2015-05-30 - Data updated: 2026-08-30 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/strng/id993782289/reviews.md ## What is strng? 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 ## Key features - 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 ## Recent user reviews (10 of 32) All indexed reviews: https://appshunter.io/ios/app/strng/id993782289/reviews.md ### 5/5 — Incredible useful rechnology *2026-05-15* This is one of. The. Most useful and inventive music creation apps on the appstore...more physical modeling apps like this please ### 2/5 — No sustain/note hold *2025-03-17* Thus I don’t use it. ### 5/5 — Bundle price not discounted properly *2024-12-03* But this review is about strng. High quality, minimal ui. I own this app, and the other 3 apps in the bundle is the same price as buying them separately. ### 4/5 — spannende Klänge *2023-11-25* sehr interessante Klänge, die mit wenigen einfachen Einstellungen über ein großes Spektrum verteilt sind - von sehr realistischen Annäherungen an echte Saiteninstrumente sowohl gestrichen als auch gezupft oder geklopft zu sehr weirden Tönen. ein bisschen verwirrend beim Spielen ist, dass weisse Linien zwischen zwei schwarzen nicht gespielt werden können. Da entspricht die visuelle Darstellung nicht ganz dem, was man tun kann. das könnte noch optimiert werden. ### 5/5 — Superb and unique synth *2022-07-11, version 1.5.9* Amazing string synth! Very large sound pallet with a minimalistic GUI. A powerfull sound design instrument. ( Would be nice to have an update in the line of the fantastic one we had for Tardigrain recently. ) ### 5/5 — Great Synthesis *2022-04-21* This is a gem. What fun! ### 5/5 — Unbelievable nice sounding synth! *2021-12-09* Great sounding! I’m looking forward to try it with mpe when my Osmose (expressive e) will arrive :) thanks for all the nice updates! I love all your instruments! ### 5/5 — Wonderful *2021-04-08* Wonderful and beautifully designed. Love the sounds it is capable of creating! ### 3/5 — Volume pedal issue AUv3 *2019-10-27* Good sound and easy to use but midi expression pedal works in standalone app but not in host AUv3 app like Camelot. I’m keyboard player and need to fade string sounds in and out as fits song so can’t use this live. ### 5/5 — One of my most used synth apps *2019-05-27* I think I paid $3 for this app, but it’s easily worth $20. Simple intuitive interface reminiscent of the op-1 string synth. I love the new update, excited to try the rest of the bundle. Thanks dude I love your work! ## Frequently asked questions about strng ### What is Strng? Strng is a mobile application that functions as a string synthesizer. It utilizes a physical modeling synthesis engine, inspired by the Karplus-Strong algorithm, to create plucked string-like sounds without using samples. The app offers 16-voice polyphony and various sound-shaping tools. ### What are the key features of Strng? Key features include its physical modeling synthesis engine, 16-voice polyphony, a 25-key multitouch keyboard with aftertouch, and support for MIDI controllers via USB or Wi-Fi. It also provides a stereo ping-pong delay and a two-channel resonant low-pass filter controlled by LFOs. ### How much does Strng cost? Based on the provided information, Strng is a paid application. There are no mentions of in-app purchases or advertisements, indicating a one-time purchase model. ### What platforms is Strng compatible with? Strng is designed for mobile devices. It supports integration with other applications through Audiobus and Inter-App Audio, and can be used as an AUv3 plugin within DAWs. It also supports Core MIDI and Bluetooth MIDI, including limited MPE. ### What are some common use cases for Strng? Strng is ideal for creating unique string instrument sounds for music production, sound design, and live performance. Its polyphonic capabilities and MIDI control make it suitable for composing melodies and harmonies, while its effects allow for detailed sound sculpting. ## Version history (last 5 releases) ### 1.5.13 — 2026-06-24 +++ Fixing issue with preset menu scrolling to the top on open, in iOS 26 and iPadOS 26 ### 1.5.12 — 2025-03-15 +++ Fixing issue resulting in no sound seen by some users in GarageBand. ### 1.5.11 — 2025-02-02 +++ Fixing touch issues seen along edges when running as AUv3 in some hosts. +++ Tweaking filter in dynamosaurus preset. +++ Other minor bug fixes. ### 1.5.10 — 2023-02-05 +++ Fixing issue where some hosts fail to load envelope state. ### 1.5.9 — 2022-05-04 +++ Exposing user presets to AUv3 host. +++ Minor UI fixes. ## Apps similar to strng | App | Rating | Price | Category | | --- | --- | --- | --- | | [Hilda Synthesizer](https://appshunter.io/ios/app/hilda-synthesizer/id6447191659) | 4.9 (57) | $12.99 | Music | | [iDensity](https://appshunter.io/ios/app/idensity/id464660779) | 4.9 (48) | $5.99 | Music | | [Enso Looper](https://appshunter.io/ios/app/enso-looper/id1449640589) | 4.5 (23) | $7.99 | Music | | [Tails - Dual Reverb](https://appshunter.io/ios/app/tails-dual-reverb/id6444164617) | 4.9 (14) | $9.99 | Music | | [TfxEcho](https://appshunter.io/ios/app/tfxecho/id1523777426) | 4.7 (12) | $4.99 | Music | | [Replicant 3](https://appshunter.io/ios/app/replicant-3/id1670715321) | — | $4.99 | Music | ## More apps by Erik Sigth - [Sinusoid](https://appshunter.io/ios/app/sinusoid/id416624795) - [shapesynth](https://appshunter.io/ios/app/shapesynth/id431097161) - [ström](https://appshunter.io/ios/app/strom/id495549899) - [nils](https://appshunter.io/ios/app/nils/id579955189) - [voice bot](https://appshunter.io/ios/app/voice-bot/id654025530) - [e-l-s-a](https://appshunter.io/ios/app/e-l-s-a/id833671355) All apps by Erik Sigth: https://appshunter.io/developer/385275335 ## Related topics [strng](https://appshunter.io/ios/topics/strng) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*