# iGrand Piano CS for iPad vs String Theory

The clearest difference is review sentiment: String Theory at 100% against iGrand Piano CS for iPad's 44%. String Theory also leads on in-app purchases (none vs 3). iGrand Piano CS for iPad's advantage is price (Free vs $1.99) and iOS requirement (13.0 vs 26.0). On ads and device support there is nothing between them.

iGrand Piano CS for iPad is free to download; String Theory costs $1.99 up front. iGrand Piano CS for iPad sells 3 one-off in-app purchases. String Theory asks for nothing beyond the download.

## The numbers

| Metric | iGrand Piano CS for iPad | String Theory |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/string-theory-guitar-practice/id6760247019/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 43.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 643 MB | 10 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [IK Multimedia US, LLC](https://appshunter.io/developer/323694278) | [DANIEL NIKOLAS SZTURM](https://appshunter.io/developer/1883123507) |

## What reviewers say

### iGrand Piano CS for iPad

[App page](https://appshunter.io/ios/app/igrand-piano-cs-for-ipad/id562914032)

Experience concert-quality grand and upright pianos with ultra-realistic sound and built-in recording. Edit and save custom variations, connect external keyboards, and compose anywhere. Expand your library with additional instrument packs.

**Highlights:** Ultra-realistic grand and upright pianos, High-definition stereo samples, Built-in MIDI recorder with overdubbing, Instrument editor with real-time controls, Audiobus and Inter-App Audio support, Expansion packs for more instruments

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Piano Expansion Pack | $14.99 | one-time |
| Piano Expansion Pack 2 | $14.99 | one-time |
| Upgrade to Full Version | $19.99 | one-time |


### String Theory

[App page](https://appshunter.io/ios/app/string-theory-guitar-practice/id6760247019)

This app helps guitarists explore scales and chords with an interactive fretboard. It allows users to compare scales, test custom tunings, and record riff ideas. The tool is designed for practicing improvisation, learning theory, and saving musical inspiration.

**Highlights:** Interactive guitar fretboard with scale mapping, Scale and Chord Finder tools, Custom tunings with octave control, Riff recording and vault organization, Left-handed mode, Scale comparison overlay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iGrand Piano CS for iPad free?

iGrand Piano CS for iPad is free to download, with in-app purchases available.

### Is String Theory free?

String Theory costs $1.99, with no in-app purchases.

### Do iGrand Piano CS for iPad or String Theory have ads?

Neither iGrand Piano CS for iPad nor String Theory shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*