# Pipe Tools vs Bolt Length

The clearest difference is review sentiment: Pipe Tools at 79% against Bolt Length's 33%. Pipe Tools also leads on rating (4.2 vs 3.0) and ads (none vs shown). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Pipe Tools sells 1 one-off in-app purchase and Bolt Length sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Pipe Tools holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: Pipe Tools has 20 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 79% of Pipe Tools's written reviews are positive against 33% of Bolt Length's.

Pipe Tools ships an update every 36 months, Bolt Length every 20 months. Both last shipped on October 8, 2026.

## The numbers

| Metric | Pipe Tools | Bolt Length |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (20 ratings)](https://appshunter.io/ios/app/pipe-tools/id372454624/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/bolt-length-nominal-length/id1042345193/reviews) |
| Number of ratings | **20** | 2 |
| Positive reviews | **78.6% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 36 months | **Every 20 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 43 MB | 6 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Bri-Steel Manufacturing](https://appshunter.io/developer/968778552) | [mitsunori oishi](https://appshunter.io/developer/905649994) |

## What reviewers say

### Pipe Tools

[App page](https://appshunter.io/ios/app/pipe-tools/id372454624)

This app provides a comprehensive steel pipe handbook with charts for wall thickness, mass, and pressure calculations. It facilitates quick conversions and cost comparisons, allowing users to prepare and send customized PDF quotes for pipe sales.

**Highlights:** Steel pipe charts (wall thickness, mass), Unit conversions (feet, meters, pounds, kg), Pipe cost comparison, Customizable PDF quote generation, Mechanical and hardness conversions, Pressure and wall thickness calculations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro Tools | $0.99 | one-time |


### 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 |


## Frequently asked questions

### Is Pipe Tools free?

Pipe Tools is free to download, with in-app purchases available.

### Is Bolt Length free?

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

### Which has better reviews, Pipe Tools or Bolt Length?

Pipe Tools is rated higher. Pipe Tools averages 4.2 out of 5 from 20 ratings, while Bolt Length averages 3.0 from 2 ratings.

### Do Pipe Tools or Bolt Length have ads?

Bolt Length shows ads; Pipe Tools does not.

### Which is updated more often, Pipe Tools or Bolt Length?

Pipe Tools ships an update every 36 months, and Bolt Length every 20 months. Most recently, Pipe Tools was updated on October 8, 2026 and Bolt Length on October 8, 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.*