moForte Guitar vs WretchUp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
moForte Guitar
This virtual guitar app uses physical modeling to replicate the expressive sound and performance techniques of a real electric guitar. It offers a vast chord library, customizable effects, and recording capabilities for musicians.
- Physical modeling sound engine
- Strumming and PowerChord modes
- Modeled feedback and distortion
- 9,500+ chords
- Customizable effects chain
- Recording and sharing performances
- Chart creation tool
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The Classic moForte Guitar, introduced in 2012, is the first virtual guitar based on modeling the physics and performance techniques of the guitar. Because the moForte Guitar is modeled rather than based on playing back samples, the performance experience is uniquely expressive and interactive. Based on based on the Physical Modeling research of Dr. Julius O. Smith III of Stanford/CCRMA. Features include: - Strumming and PowerChord modes. - Modeled feedback and distortion like a real metal guitar. - A selection of models for popular types of electric guitars. - Recording and sharing of performances. - 9,500+ chords. - Powerful authoring tool for chart creation - supports custom chords and effect presets. - Modeled guitar articulations including: harmonics, pinch harmonics, slides, palm muting, string scraping, damping and auto-strum. - Fully programmable effects chain including: distortion, compression, wah, auto wah, 4-band parametric EQ, phaser, flanger, reverb and amplifier. iOS/iPadOS 13.7 or better
WretchUp
This app offers a unique audio manipulation experience, allowing users to create sonic mayhem with pitch-shifted delays, filters, and sampling. It's designed for live performance and studio use, enabling musicians and sound enthusiasts to generate wild noises and unique effects.
- Pitch-shifted delay with feedback and filter
- Live performance-oriented controls
- Gesture-based play
- Record vocals and instruments
- Sample and manipulate loops
- Inter-App-Audio and Audiobus support
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An effect instrument anyone can play - sonic anarchy in the palm of your hand. iOS Mars: "Barely controlled chaos“, "sonic extremes“, "well suited for live use“ Music App Blog: "if you like the occasional dose of sonic mayhem, then this is an app that will let you make it" WretchUp is the sonic instrument from the imagination of Mouse on Mars Instruments. Used by the duo in their live performances, it's a playable effect inspired by analog hardware. Sing into it, speak into it, plug in an instrument, sample sounds, and then make sonic mayhem. It's been tested in Mouse on Mars' live shows and used in studio albums. But now it's available to anyone - whether you're a musician wanting to create unique sounds or you just want to make some wild noises and frighten friends and enemies. // FEATURES - Pitch-shifted delay with feedback and filter - Unique controls, designed to be used in live performance and tested onstage - Play with gestures, even without looking closely at the screen - Record vocals or instruments from the built-in mic or another input - Sample loops and change their speed - Adjust the feedback loop, pitch, and filter for unique sounds - Make inputs by holding down your finger, or lock input for continuous sampling - Inter-App-Audio supported - Audiobus supported www.mouseonmars.com/mominstruments Features artwork by Rupert Smyth. Pure Data-based, open source patch created by Florian Grote and Peter Kirn with Mouse on Mars. App design by Oliver Greschke. Powered by free and open source software libpd. Note: like all mic-based effects, you need to enable microphone input. If you accidentally did not allow mic input, you can allow later via: Device settings, WretchUp, Data settings, Microphone, allow mic input.
Screenshots
Verdict
The clearest difference is rating: moForte Guitar at 5.0 against WretchUp's 3.1. moForte Guitar also leads on price ($3.99 vs $4.99). WretchUp's advantage is in-app purchases (none vs 10) and update cadence (every 3 weeks vs every 2 months). On ads, monetization model 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
moForte Guitar costs $3.99 and WretchUp $4.99 up front. moForte Guitar sells 7 one-off in-app purchases. WretchUp asks for nothing beyond the download.
moForte Guitar holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: WretchUp has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 76% of moForte Guitar's written reviews are positive against 91% of WretchUp's, so the app with the better star average is not the one people write more warmly about.
moForte Guitar ships an update every 2 months, WretchUp every 3 weeks. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.
| Parameter | moForte Guitar | WretchUp |
|---|---|---|
| Price | $3.99 — better | $4.99 |
| Rating | 5.0 (1 ratings) — better | 3.1 (9 ratings) |
| Positive reviews | 76.0% of reviews | 90.9% of reviews — better |
| Number of ratings | 1 | 9 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.7 | 11.0 — better |
| Further details — not scored | ||
| Size | 57 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | moForte.com | MoMinstruments GbR |
Customer experience
moForte Guitar
WretchUp
In-app purchases
moForte Guitar
- Rising Sun Blues2 variantsFree
- Mountain Aire2 variantsFree
- Thor's Hammer2 variantsFree
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- Loki's LamentFree
- Odious OdinFree
- Star Spangled Banner Pack$1.99
- Bourrée in E minor$1.99
WretchUp
No in-app purchases









