# Bolt Length vs Simpliinspect Pro

The clearest difference is in-app purchases: Simpliinspect Pro at none against Bolt Length's 1. Simpliinspect Pro also leads on ads (none vs shown) and iOS requirement (11.0 vs 14.0). On price and device support there is nothing between them.

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

## The numbers

| Metric | Bolt Length | Simpliinspect Pro |
| --- | --- | --- |
| 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 | — |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 31 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [mitsunori oishi](https://appshunter.io/developer/905649994) | [SIMPLIBIZZ TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1681771070) |

## 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 |


### Simpliinspect Pro

[App page](https://appshunter.io/ios/app/simpliinspect-pro/id6450109461)

**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 Simpliinspect Pro free?

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

### Do Bolt Length or Simpliinspect Pro have ads?

Bolt Length shows ads; Simpliinspect Pro does not.

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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.*