# Metric Conversion tool vs Flange Bolt Size & Torque

The clearest difference is in-app purchases: Metric Conversion tool at none against Flange Bolt Size & Torque's 2. Metric Conversion tool also leads on ratings volume (15K vs 373) and rating (4.8 vs 4.6). Flange Bolt Size & Torque's advantage is ads (none vs shown). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. Flange Bolt Size & Torque sells 2 in-app purchases, starting at $4.99 per 3 months. Metric Conversion tool asks for nothing beyond the download.

Metric Conversion tool holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Metric Conversion tool has 15K ratings behind it against 373, so its average is the more settled of the two. Written reviews point the same way: 69% of Metric Conversion tool's written reviews are positive against 65% of Flange Bolt Size & Torque's.

Metric Conversion tool ships an update fortnightly, Flange Bolt Size & Torque monthly. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Metric Conversion tool | Flange Bolt Size & Torque |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (15K ratings)](https://appshunter.io/ios/app/metric-conversion-tool/id1439430070/reviews)** | [4.6 (373 ratings)](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965/reviews) |
| Number of ratings | **15K** | 373 |
| Positive reviews | **69.2% of reviews** | 65.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 31 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wight Hat](https://appshunter.io/developer/1425885740) | [Open Source Consulting LLC](https://appshunter.io/developer/1222335487) |

## What reviewers say

### Metric Conversion tool

[App page](https://appshunter.io/ios/app/metric-conversion-tool/id1439430070)

This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise results.

**Highlights:** Offline functionality, Over 30,000 unit conversions, 160+ currencies with live rates, Save favorite conversions, Answers in fractions, Up to 5 decimal places

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

**In-app purchases:** none

**What reviewers like**

- 💡 Useful conversion tool
- 👍 Easy to use and navigate
- 🚀 Quick and efficient
- 👍 Comprehensive coverage of conversions

**What reviewers complain about**

- 🔊 Intrusive and loud ads
- 🔒 Questionable privacy practices
- 🐛 Inaccurate conversions
- 👎 Disruptive to workflow

**Reported bugs**

- Temperature conversion displaying incorrect values
- Ads triggering false memory full warnings

**Requested features**

- Paid version to remove ads
- Option to display results in preferred format
- Speed conversion (mph, km/h, etc.)


### Flange Bolt Size & Torque

[App page](https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965)

Instantly access flange, pipe, and bolt data offline. Quickly find bolt sizes, torque patterns, flange dimensions, and pipe specifications. Ideal for pipefitters and steamfitters needing rapid access to piping information.

**Highlights:** Offline data access, Instant data lookups, Flange bolting data, Flange dimensions data, Pipe data, Gasket data, Torque pattern images

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flange Bolt Professional | $4.99 | per 3 months |
| Suggested Torque | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Huge time saver
- ✅ Reliable data
- 🛠️ Very helpful tool
- 💡 Useful for trade/craft

**What reviewers complain about**

- 💸 Now charges for features
- 👎 Used to be better
- 📉 Functionality decreased after redesign
- ❌ Missing Code 61/62 flange info
- 💰 Subscription model disliked

**Reported bugs**

- App stopped working, requires resubscription
- App will not open after latest update
- App is broken
- Black screen and grey bar in the middle
- Wrench sizes don't match up on some flanges

**Requested features**

- Add Code 61/62 flange information
- Include machined bolt sizes
- Add torquing equipment info (rad guns, J gun, etc.) and usage instructions
- Include CGI and CG torque specs for different gasket styles
- Add support for larger flange sizes (beyond 60")


## Frequently asked questions

### Is Metric Conversion tool free?

Metric Conversion tool is free to download, with no in-app purchases.

### Is Flange Bolt Size & Torque free?

Flange Bolt Size & Torque is free to download, with in-app purchases available.

### Which has better reviews, Metric Conversion tool or Flange Bolt Size & Torque?

Metric Conversion tool is rated higher. Metric Conversion tool averages 4.8 out of 5 from 15K ratings, while Flange Bolt Size & Torque averages 4.6 from 373 ratings.

### Do Metric Conversion tool or Flange Bolt Size & Torque have ads?

Metric Conversion tool shows ads; Flange Bolt Size & Torque does not.

### Which is updated more often, Metric Conversion tool or Flange Bolt Size & Torque?

Metric Conversion tool ships an update fortnightly, and Flange Bolt Size & Torque monthly. Most recently, Metric Conversion tool was updated on October 30, 2026 and Flange Bolt Size & Torque on October 24, 2026.

---

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