# Bolt Length vs AutoTrack Driver

The clearest difference is rating: AutoTrack Driver at 5.0 against Bolt Length's 3.0. AutoTrack Driver also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Bolt Length sells 1 one-off in-app purchase. AutoTrack Driver asks for nothing beyond the download.

AutoTrack Driver holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Both ship on a similar rhythm, roughly every 20 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Bolt Length | AutoTrack Driver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/bolt-length-nominal-length/id1042345193/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/autotrack-driver/id1586935453/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 20 months | Every 20 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 6 MB | 49 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mitsunori oishi](https://appshunter.io/developer/905649994) | [Enmanuel Andres Requena Abreu](https://appshunter.io/developer/1581387887) |

## What reviewers say

### Bolt Length

[App page](https://appshunter.io/ios/app/bolt-length-nominal-length/id1042345193)

This application helps calculate the length of metric coarse screws based on Japanese Industrial Standards. It is designed for mechanical design purposes and should be used at the user's own risk.

**Highlights:** Metric coarse screw length calculation, Conforms to Japanese Industrial Standards (JIS), Designed for mechanical design, User risk disclaimer

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide Ads | $1.99 | one-time |


### AutoTrack Driver

[App page](https://appshunter.io/ios/app/autotrack-driver/id1586935453)

Streamline vehicle inspections with digital checklists and photo evidence. Easily manage daily reports, track expenses, and ensure vehicle efficiency through regular, paperless checks. Facilitates pre and post-trip inspections with digital signatures.

**Highlights:** Digital inspection checklists, Photo evidence capture, Expense tracking, Pre and post-trip classification, Digital signatures, Paperless reporting

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bolt Length free?

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

### Is AutoTrack Driver free?

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

### Which has better reviews, Bolt Length or AutoTrack Driver?

AutoTrack Driver is rated higher. Bolt Length averages 3.0 out of 5 from 2 ratings, while AutoTrack Driver averages 5.0 from 1 ratings.

### Do Bolt Length or AutoTrack Driver have ads?

Bolt Length shows ads; AutoTrack Driver does not.

### Which is updated more often, Bolt Length or AutoTrack Driver?

Bolt Length ships an update every 20 months, and AutoTrack Driver every 20 months. Most recently, Bolt Length was updated on November 2, 2026 and AutoTrack Driver on November 3, 2026.

---

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