# iStroboSoft vs THE FEEL BOOK

The clearest difference is price: THE FEEL BOOK at Free against iStroboSoft's $9.99. iStroboSoft's advantage is chart position (#15 vs unranked) and ratings volume (298 vs 55). On rating, review sentiment, update cadence and ads there is nothing between them.

THE FEEL BOOK is free to download; iStroboSoft costs $9.99 up front. iStroboSoft sells 11 one-off in-app purchases and THE FEEL BOOK sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.3 for iStroboSoft against 4.4 for THE FEEL BOOK. That said, the two scores are not equally well evidenced: iStroboSoft has 298 ratings behind it against 55, so its average is the more settled of the two. Written reviews are what separate them: 76% of iStroboSoft's written reviews are positive against 71% of THE FEEL BOOK's.

iStroboSoft ships an update fortnightly, THE FEEL BOOK every 2 weeks. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | iStroboSoft | THE FEEL BOOK |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.3 (298 ratings)](https://appshunter.io/ios/app/istrobosoft/id308296029/reviews) | **[4.4 (55 ratings)](https://appshunter.io/ios/app/the-feel-book/id6746460341/reviews)** |
| Number of ratings | **298** | 55 |
| Positive reviews | **76.0% of reviews** | 71.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#15** | — |
| Size | 5 MB | 73 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Peterson Tuners](https://appshunter.io/developer/308296032) | [2XJ VENTURES LLC](https://appshunter.io/developer/1815547217) |

## What reviewers say

### iStroboSoft

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

**Currently charting:** #15 Top Paid · Music, #149 Top Paid (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


### THE FEEL BOOK

[App page](https://appshunter.io/ios/app/the-feel-book/id6746460341)

Practice jazz improvisation with recordings of world-class musicians. Hone your skills with a sophisticated rhythm section and access a growing library of transposable lead sheets. Experiment with advanced features like looping, transposition, and a 3-channel mixer to elevate your musical performance.

**Highlights:** Improvise with a professional rhythm section, Isolate and study bass lines, Sophisticated piano harmony, Transposable lead sheets, Advanced looping capabilities, Variable tempo control, 3-channel instrument mixer

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $6.99 | per month |
| Quarterly Subscription | $16.49 | per 3 months |
| Annual Subscription | $47.90 | per year |


## Frequently asked questions

### Is iStroboSoft free?

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

### Is THE FEEL BOOK free?

THE FEEL BOOK is free to download, with in-app purchases available.

### Which has better reviews, iStroboSoft or THE FEEL BOOK?

THE FEEL BOOK is rated higher. iStroboSoft averages 4.3 out of 5 from 298 ratings, while THE FEEL BOOK averages 4.4 from 55 ratings.

### Do iStroboSoft or THE FEEL BOOK have ads?

Neither iStroboSoft nor THE FEEL BOOK shows ads.

### Which is updated more often, iStroboSoft or THE FEEL BOOK?

iStroboSoft ships an update fortnightly, and THE FEEL BOOK every 2 weeks. Most recently, iStroboSoft was updated on October 23, 2026 and THE FEEL BOOK on October 22, 2026.

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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.*