# iStroboSoft vs String Theory

The clearest difference is rating: String Theory at 5.0 against iStroboSoft's 4.3. String Theory also leads on price ($1.99 vs $9.99) and in-app purchases (none vs 11). iStroboSoft's advantage is ratings volume (298 vs 1) and chart position (#29 vs unranked). On ads and device support there is nothing between them.

iStroboSoft costs $9.99 and String Theory $1.99 up front. iStroboSoft sells 11 one-off in-app purchases. String Theory asks for nothing beyond the download.

String Theory holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: iStroboSoft has 298 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 76% of iStroboSoft's written reviews are positive against 100% of String Theory's.

## The numbers

| Metric | iStroboSoft | String Theory |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Rating | [4.3 (298 ratings)](https://appshunter.io/ios/app/istrobosoft/id308296029/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/string-theory-guitar-practice/id6760247019/reviews)** |
| Number of ratings | **298** | 1 |
| Positive reviews | 76.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#29** | — |
| Size | 5 MB | 10 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Peterson Tuners](https://appshunter.io/developer/308296032) | [DANIEL NIKOLAS SZTURM](https://appshunter.io/developer/1883123507) |

## What reviewers say

### iStroboSoft

[App page](https://appshunter.io/ios/app/istrobosoft/id308296029)

**Currently charting:** #29 Top Paid · Music (US App Store)

This application provides highly accurate tuning for musical instruments, offering professional-grade precision with a real-time strobe display. It supports various tuning modes, temperaments, and input methods, making it suitable for both acoustic and electric instruments.

**Highlights:** 1/10th cent accuracy, Real-time strobe display, Guided Mode Tuning, 12 Temperaments with adjustable root, Assisted Low Note Detection, Drop/Capo mode, Adjustable Concert A

**Features:** Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extended Frequency Modes | $4.99 | one-time |
| Bluegrass Sweeteners | $5.99 | one-time |
| Buzz Feiten Pack | $5.99 | one-time |
| Guitar & Bass Sweeteners | $5.99 | one-time |
| Orchestral Sweeteners | $5.99 | one-time |
| World Sweetener Pack | $9.99 | one-time |
| Tuning Tools | $9.99 | one-time |
| Steel Guitar Sweeteners | $14.99 | one-time |
| Harmonic Tuning | $19.99 | one-time |
| Keyboard Sweeteners | $19.99 | one-time |
| Full Discounted Upgrade Pack | $59.99 | one-time |

**What reviewers like**

- 🚀 Extremely accurate
- 🔒 Reliable and stable
- 👍 Fantastic for instrument setup and intonation
- 👍 Portable and convenient
- 👍 Excellent value for the price

**What reviewers complain about**

- 🐛 Compatibility issues with iOS updates
- 💰 Expensive in-app purchases for additional features
- 🐛 Inconsistent performance, jumps between notes
- 🐛 Struggles with low and high notes
- 🐛 Microphone input not always reliable

**Reported bugs**

- App freezes or crashes on certain iOS versions
- Incorrect note detection on some instruments
- Display issues with newer iPhone/iPad models

**Requested features**

- Add support for more sweetened tunings and temperaments
- Improve display visibility and layout for newer devices
- Integrate with audio apps and allow routing through other apps
- Add Apple Watch app for quick tuning access
- Improve noise filtering and input sensitivity


### 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 iStroboSoft free?

iStroboSoft costs $9.99, and also offers in-app purchases.

### Is String Theory free?

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

### Which has better reviews, iStroboSoft or String Theory?

String Theory is rated higher. iStroboSoft averages 4.3 out of 5 from 298 ratings, while String Theory averages 5.0 from 1 ratings.

### Do iStroboSoft or String Theory have ads?

Neither iStroboSoft 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.*