Elastic OSC vs Streichfett
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Elastic OSC
This synthesizer app offers a vast range of sounds inspired by a popular hardware module. It features 24 distinct oscillator models, intuitive XY pads for sound manipulation, and a versatile arpeggiator. Play it with an on-screen or external keyboard for monophonic or polyphonic sound design.
- 24 distinct sound engines based on Plaits DSP
- Intuitive XY pads for sound manipulation
- Versatile arpeggiator with multiple modes
- Integrated help system for all features
- DX7 bank and wavetable import
- 5 master effects with automations
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Elastic OSC is a synthesizer app based on the DSP code of the Mutable Instruments Plaits hardware oscillator module, one of the most beloved (and cloned) oscillator modules in the Eurorack modular scene! Like the original, Elastic OSC comes with a wide variety of possible sounds, from analog-style, FM, and additive sounds to physical modeling, percussive, and even drum sounds. Elastic OSC can be used in both monophonic and 8-voice polyphonic modes. You can play the app using the (on-screen) keyboard or an external keyboard or sequencer inside your DAW of choice. The app focuses on ease of use, featuring two XY pads for intuitive sound manipulation of the OSC engine and the effects. Despite the simplicity of the cleaned-up interface, the sound possibilities are vast – thanks to 24 different oscillator models and the ability to automate parameter changes, as it is possible in all Elastic apps released so far. A versatile Arpeggiator makes it easy to start with simple ideas or can already create entire sonic worlds. Elastic OSC includes an integrated help system (tap “?”) to provide explanations for nearly every GUI element, the underlying DSP model, and most of the app’s functionality. CDM: "Elastic OSC becomes a must on iOS. It’s fun to use as an instrument in your iPad DAW of choice." SYNTH ANATOMY: "Takes the Mutable Instruments (Plaits) algorithms on a wild trip. A nearly perfect app." ROBERT LIPPOK: "Elastic OSC is incredibly fun to work with from the very first minute. The GUI is really well thought out and has 24 integrated synthesis models, as well as the ability to load DX7 sound banks. Omg, so good." --- FEATURES --- SYNTHESIZER – 24 different Sound Engines from MI Plaits DSP code – 4 main parameters per synth engine (Frequency, Harmonics, Morph, Harmo) – Recordable Modulations/Automations for almost all Parameters with a length of 1, 2 or 4 beats. – ADSR Envelope for Amplifier – LPG Envelope for Modulations of Timbre, FM, Harmonics – Adjustable Velocity effect on Volume and/or LPG Modulation – DX7 Bank and Wavetable Import ARPEGGIATOR With different Arp Modes, Rates, Octave Ranges and Skip Notes functionality MASTER FX – 5 effects (5 different Overdrive/Distortions, Hi-Low-Filter, Chorus/Flanger, Delay, Reverb) – Automations for all effects parameters – Master Gain and switchable Limiter effect SYNTH ENGINES - Virtual Analog - Waveshaping - 2 OP FM - Granular Formant - Additive - Wavetable - Chords - Speech - Granular Cloud - Filtered Noise - Particle Noise - String Model - Modal Resonator - Bass Drum - Snare Drum - Hi-Hat - Virt. Analog VCF - Phase Distortion - 6 OP FM 1 - 6 OP FM 2 - 6 OP FM 3 - Wave Terrain - String Machine - Chiptune —————— LFOs LFO 1 is for free, while three additional LFOs can be unlocked via In-App Purchase. LFO MODULATION TARGETS • Frequency Amount • Timbre Amount • Morph Amount • Harmonics Amount • Filter Amount • Pan Amount LFO MIX The MIX view enables you to blend multiple LFOs and define how strongly each active LFO influences a target parameter. The closer a target is placed to an LFO corner, the stronger its influence. All active LFOs always sum up to 100% (e.g. LFO1 50%, LFO2 30%, LFO3 20%).
Streichfett
Experience the sound of legendary 70s and 80s string synthesizers on your iPad. This app recreates the classic String Machine experience with a dual sound engine for polyphonic strings and an eight-voice solo section, complete with ensemble, phaser, and reverb effects.
- Dual sound engine (String & Solo sections)
- Polyphonic String Section
- Eight-voice Solo Section
- Ensemble Effect
- Phaser and Reverb effects
- Animate Effect for sound morphing
- AUv3 support
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The sound engine of the legendary Waldorf Streichfett hardware is now available for iPad including AUv3 format. The Streichfett takes you back to the days of the legendary String Machines. In the old days, there was no choice – to create a massive wall of sound, you simply needed a String Machine. It was the time when composing contemporary music had no resemblance to doing your annual tax return on a PC. It was the golden years of rock and pop, when even keyboard players simply plugged their instrument into the amp and started playing, instead of labouring over endless preset lists in search of the perfect sound. Now there is Streichfett – and the good old days are coming back. Experience what a real String Synthesizer sounds like. Experience how a homogeneous, extremely dense, floating web of sounds can be created from a raw, basic electronic sound in just a few simple steps. Streichfett combines the best of the previously extinct species of String Synthesizers of the 70s and early 80s. Its dual sound engine features a fully polyphonic String Section and an eight voice Solo Section, which is essential for recreating classic movie sounds from the 70s and 80s. The Ensemble Effect provides depth and movement to the String Section, while the Effects Section adds adjustable Phaser and Reverb effects. Additionally, the Animate Effect can be used to modulate the Strings Registration, allowing spectacular sound morphs. The Solo Section offers presets named Bass, E-Piano or Clavi, and just like with a typical String Machine, the sound has little to do with that name. Instead, these are shimmering and slightly percussive sounds that blend well with the String Section. Although the User Interface is simple and easy to comprehend, it controls a rather complex sound engine which is capable of delivering rich and creamy pads unlike any other instrument.
Screenshots
Verdict
The clearest difference is in-app purchases: Streichfett at none against Elastic OSC's 2. Streichfett also leads on price ($14.99 vs $17.99) and chart position (#185 vs unranked). Elastic OSC's advantage is update cadence (fortnightly vs every 4 months) and review sentiment (92% vs 78%). On rating, ratings volume, ads 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
Elastic OSC costs $17.99 and Streichfett $14.99 up front. Elastic OSC sells 2 one-off in-app purchases. Streichfett asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Elastic OSC against 4.6 for Streichfett. Both are backed by a comparable volume of ratings — 39 and 19 respectively. Written reviews are what separate them: 92% of Elastic OSC's written reviews are positive against 78% of Streichfett's.
Elastic OSC ships an update fortnightly, Streichfett every 4 months. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.
| Parameter | Elastic OSC | Streichfett |
|---|---|---|
| Price | $17.99 | $14.99 — better |
| Rating | 4.7 (39 ratings) — better | 4.6 (19 ratings) |
| Positive reviews | 92.0% of reviews — better | 77.8% of reviews |
| Number of ratings | 39 — better | 19 |
| Update frequency | Fortnightly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | — | #185 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 58 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Oliver Greschke (DE) | Waldorf Music |
Customer experience
Elastic OSC
Streichfett
In-app purchases
Elastic OSC
- Multi LFOs$3.99
- Unlock MPE for expressive control$4.99
Streichfett
No in-app purchases









