# TreadReader vs Shifty!

The clearest difference is in-app purchases: TreadReader at none against Shifty!'s 1. TreadReader also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 3 months). On price there is nothing between them.

Both are free to download. Shifty! sells 1 one-off in-app purchase. TreadReader asks for nothing beyond the download.

TreadReader ships an update every 5 weeks, Shifty! every 3 months. The most recent releases landed on June 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | TreadReader | Shifty! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/treadreader/id1528184960/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 109 MB | 3 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SNAP-ON EQUIPMENT INC](https://appshunter.io/developer/1375570882) | [Paul Fraser](https://appshunter.io/developer/482131297) |

## What reviewers say

### TreadReader

[App page](https://appshunter.io/ios/app/treadreader/id1528184960)

This app controls a handheld scanner to perform 3D tire tread depth scans. It guides users through single or full vehicle scans, generating PDF summary reports that highlight uneven wear due to alignment, inflation, or suspension issues.

**Highlights:** Controls TreadReader Hand Held Scanner, Single and full vehicle tire scans, 3D tread depth measurements, Identifies uneven wear causes, Generates PDF Summary Reports, App setup and configuration

**Features:** macOS Compatibility

**In-app purchases:** none


### Shifty!

[App page](https://appshunter.io/ios/app/shifty/id6702022030)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shifty Pro | $9.99 | one-time |


## Frequently asked questions

### Is TreadReader free?

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

### Is Shifty! free?

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

### Do TreadReader or Shifty! have ads?

Shifty! shows ads; TreadReader does not.

### Which is updated more often, TreadReader or Shifty!?

TreadReader ships an update every 5 weeks, and Shifty! every 3 months. Most recently, TreadReader was updated on June 5, 2026 and Shifty! 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.*