# REACTOR vs String Ledger

The clearest difference is rating: String Ledger at 4.4 against REACTOR's 3.4. String Ledger also leads on review sentiment (80% vs 47%). REACTOR's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. String Ledger sells 2 in-app purchases, starting at $4.99 per month. REACTOR asks for nothing beyond the download.

String Ledger holds the better App Store score, 4.4 against 3.4. Both are backed by a comparable volume of ratings — 23 and 5 respectively. Written reviews point the same way: 47% of REACTOR's written reviews are positive against 80% of String Ledger's.

REACTOR ships an update every 3 weeks, String Ledger fortnightly. The most recent releases landed on October 8, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | REACTOR | String Ledger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (23 ratings)](https://appshunter.io/ios/app/reactor-amp-intelligence/id6755539496/reviews) | **[4.4 (5 ratings)](https://appshunter.io/ios/app/string-ledger/id6773358381/reviews)** |
| Number of ratings | **23** | 5 |
| Positive reviews | 46.7% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 713 MB | 61 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Positive Grid Inc](https://appshunter.io/developer/751979910) | [Larry Riker](https://appshunter.io/developer/1059278226) |

## What reviewers say

### REACTOR

[App page](https://appshunter.io/ios/app/reactor-amp-intelligence/id6755539496)

This app generates guitar tones by analyzing audio, images, or text descriptions. It offers deep control over amp models and effects, allowing users to create, save, and share custom sounds with a community. Requires a compatible amplifier for full functionality.

**Highlights:** AI-powered tone generation from audio, image, or text, 24 amp models with deep parameter control, 8 simultaneous effect slots, Drag-and-drop signal path editing, Custom amp creation and sharing, Preset library and onboard amp slots, Built-in tuner

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### String Ledger

[App page](https://appshunter.io/ios/app/string-ledger/id6773358381)

Organize your music instruments and gear with detailed logging, maintenance tracking, and gig list creation. Generate insurance-ready reports and assign beneficiaries for your collection.

**Highlights:** Catalog instruments and gear, Track strings and maintenance, Create gig lists, Generate insurance reports, Assign beneficiaries, Log purchase and current value

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| String Ledger Pro Monthly | $4.99 | per month |
| String Ledger Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is REACTOR free?

REACTOR is free to download, with no in-app purchases.

### Is String Ledger free?

String Ledger is free to download, with in-app purchases available.

### Which has better reviews, REACTOR or String Ledger?

String Ledger is rated higher. REACTOR averages 3.4 out of 5 from 23 ratings, while String Ledger averages 4.4 from 5 ratings.

### Do REACTOR or String Ledger have ads?

String Ledger shows ads; REACTOR does not.

### Which is updated more often, REACTOR or String Ledger?

REACTOR ships an update every 3 weeks, and String Ledger fortnightly. Most recently, REACTOR was updated on October 8, 2026 and String Ledger on September 26, 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.*