MathMusic vs Just Pedals
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MathMusic
This app allows users to create music by manipulating virtual guitar strings to change pitch. Explore chords, play individual notes rhythmically, and save your creations to layer melodies over accompaniments.
- Adjustable virtual guitar strings for pitch control
- Chord creation with major and minor variations
- Original chords not found on other instruments
- Arpeggio mode for rhythmic note playback
- Tempo control
- Save and layer musical notes for accompaniment and melody
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Now let's open the app. First, press the button 1. There was a sound and a red line came out. Think of this as a guitar string. A square with a rotating end of the string. Drag this to change the pitch. It goes up and down. Playing a long string on a guitar produces a low note, and playing a short string produces a high note. Next, let's press the button 2. This time, the number of strings has increased and chords have come out. If you press 3 again, it will become a triad, but please press the Maj button here. How about that. The sound is brighter (major). In addition, Min button. It became a sad sound (minor). Visually, the mood changes a lot, even though it changes only slightly. We have prepared all the well-known chords, so please try them out. We also prepared original chords with this app. Some sounds are difficult to produce with other instruments. With this app, you can play all chords up to 6 chords. In addition, you can press the Arpeg button to play one note at a time, creating a rhythm. You can change the tempo with the button such as Bpm Up on the white side at the bottom left. Now try pressing the Save button at the bottom left. The current sound has been saved and is now Note 1. When you press this Note, the previously saved sound will be output, and you can combine new sounds on top of it. As a basic usage, you can play a song by using the saved sound (blue) as an accompaniment and the current sound (red) as a melody. Please try playing your own music!
Just Pedals
Transform your iPhone or iPad into a powerful multi-effect processor for guitar and bass. Experience high-quality, zero-latency sound processing with an intuitive interface that mimics real-world pedals. Ideal for both traditional setups and amp-less configurations.
- Multi-effect processor for guitar/bass
- Zero-latency sound processing
- Intuitive, uncluttered user interface
- 16 virtual effect pedals included
- Cab simulator
- High-resolution, responsive layout
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Did you know that you can use your iPhone or iPad as a multi-effect processor for your electric guitar and bass? You only need an iOS-compatible audio interface and Just Pedals! Just Pedals can sculpt your tone as part of a traditional effect chain, or otherwise spare you from bulky hardware and patching nightmares in fully amp-less setups with DI/headphone output, and anything in beetween. It delivers tremendous sound quality that easily rivals the best known and most expensive products on the market, both analog and digital. Furthermore, the sound processing engine is absolutely zero-latency and designed for a fully glitch-free experience, with interaction smoothing and fade in/out algorithms applied everywhere. We promise you'll be jamming immediately. The user interface is as uncluttered, focused, straightforward, intuitive and pleasant as it could possibly be. You'll just be faced with a bunch of pedals as you would in the real world. No settings or configurations, no distracting graphics and features, but rather a fully-repsonsive high-resolution layout that adapts to any screen and orientation. At the same time, you'll always have visual indications and instantaneous control over input and output volumes, bypass and mute, output mode, as well as an emergency reset button. Just Pedals comes with 16 essential virtual effect pedals, namely: - Noise Suppressor - Ring Modulator - Overdrive - Distortion - Fuzz - Bitcrusher - Compressor - 10-Band Equalizer - Chorus - Phaser - Flanger - Tremolo - Vibrato - Delay - Reverb - Cab simulator Learn more at https://clack.digital/just-pedals
Screenshots
Verdict
The clearest difference is update cadence: MathMusic at every 2 days against Just Pedals's weekly. MathMusic also leads on iOS requirement (11.0 vs 14.0). Just Pedals's advantage is ratings volume (6 vs 2). On price, rating, review sentiment and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MathMusic holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
MathMusic ships an update every 2 days, Just Pedals weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | MathMusic | Just Pedals |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.8 (6 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 6 — better |
| Update frequency | Every 2 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 31 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | Yaneurabeya | Orastron Srl |
Customer experience
MathMusic
Just Pedals
In-app purchases
MathMusic
No in-app purchases
Just Pedals
No in-app purchases



