# Piano Tuner's Slide Rule vs ToolBox

The clearest difference is price: ToolBox at Free against Piano Tuner's Slide Rule's $34.99. ToolBox also leads on update cadence (weekly vs every 48 months). Piano Tuner's Slide Rule's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

ToolBox is free to download; Piano Tuner's Slide Rule costs $34.99 up front. ToolBox sells 2 one-off in-app purchases. Piano Tuner's Slide Rule asks for nothing beyond the download.

Piano Tuner's Slide Rule ships an update every 48 months, ToolBox weekly. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Piano Tuner's Slide Rule | ToolBox |
| --- | --- | --- |
| Price | $34.99 | **Free** |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/toolbox-softpath-electronics/id6742079348/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Weekly** |
| Monetization | — | Free |
| Size | 1 MB | 9 MB |
| Requires iOS | **15.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mark Cerisano](https://appshunter.io/developer/1645711446) | [Softpath Electronics](https://appshunter.io/developer/1796706067) |

## What reviewers say

### Piano Tuner's Slide Rule

[App page](https://appshunter.io/ios/app/piano-tuners-slide-rule/id1645711444)

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

**In-app purchases:** none


### ToolBox

[App page](https://appshunter.io/ios/app/toolbox-softpath-electronics/id6742079348)

This app offers over 25 utilities to simplify daily tasks, including calculators, generators, scanners, and organizational tools. It features widgets for quick access to frequently used functions and integrates with shortcuts for enhanced efficiency.

**Highlights:** Over 25 versatile utility tools, QR/Barcode scanner and generator, Multiple calculators (BMI, volume, area), Unit converter, Notes and checklists, Widgets for quick access, iOS Shortcuts integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $0.99 | one-time |
| ToolBox Pro | $1.99 | one-time |


## Frequently asked questions

### Is Piano Tuner's Slide Rule free?

Piano Tuner's Slide Rule costs $34.99, with no in-app purchases.

### Is ToolBox free?

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

### Do Piano Tuner's Slide Rule or ToolBox have ads?

Neither Piano Tuner's Slide Rule nor ToolBox shows ads.

### Which is updated more often, Piano Tuner's Slide Rule or ToolBox?

Piano Tuner's Slide Rule ships an update every 48 months, and ToolBox weekly. Most recently, Piano Tuner's Slide Rule was updated on November 7, 2026 and ToolBox on November 4, 2026.

---

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