# TreadReader vs KIEHL App

TreadReader and KIEHL App are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TreadReader ships an update every 5 weeks, KIEHL App every 3 weeks. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TreadReader | KIEHL App |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 109 MB | 44 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SNAP-ON EQUIPMENT INC](https://appshunter.io/developer/1375570882) | [KOCHAN & PARTNER](https://appshunter.io/developer/480687683) |

## 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


### KIEHL App

[App page](https://appshunter.io/ios/app/kiehl-app/id6752248703)

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

**In-app purchases:** none


## Frequently asked questions

### Is TreadReader free?

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

### Is KIEHL App free?

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

### Do TreadReader or KIEHL App have ads?

Neither TreadReader nor KIEHL App shows ads.

### Which is updated more often, TreadReader or KIEHL App?

TreadReader ships an update every 5 weeks, and KIEHL App every 3 weeks. Most recently, TreadReader was updated on October 14, 2026 and KIEHL App on October 10, 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.*