# Bolt Length vs IRIS Intelligent Reporting

The clearest difference is in-app purchases: IRIS Intelligent Reporting at none against Bolt Length's 1. IRIS Intelligent Reporting also leads on ads (none vs shown) and update cadence (every 4 months vs every 20 months). On price, device support and iOS requirement there is nothing between them.

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

Bolt Length ships an update every 20 months, IRIS Intelligent Reporting every 4 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Bolt Length | IRIS Intelligent Reporting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/bolt-length-nominal-length/id1042345193/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 20 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 38 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mitsunori oishi](https://appshunter.io/developer/905649994) | [Paint Technology Solutions](https://appshunter.io/developer/897825444) |

## 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 |


### IRIS Intelligent Reporting

[App page](https://appshunter.io/ios/app/iris-intelligent-reporting/id6743098449)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bolt Length free?

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

### Is IRIS Intelligent Reporting free?

IRIS Intelligent Reporting is free to download, with no in-app purchases.

### Do Bolt Length or IRIS Intelligent Reporting have ads?

Bolt Length shows ads; IRIS Intelligent Reporting does not.

### Which is updated more often, Bolt Length or IRIS Intelligent Reporting?

Bolt Length ships an update every 20 months, and IRIS Intelligent Reporting every 4 months. Most recently, Bolt Length was updated on November 2, 2026 and IRIS Intelligent Reporting on October 30, 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.*