# Drill and Tap Tool vs Metric Conversion tool

The clearest difference is price: Metric Conversion tool at Free against Drill and Tap Tool's $1.99. Metric Conversion tool also leads on rating (4.8 vs 4.3) and ratings volume (15K vs 30). Drill and Tap Tool's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.1). On review sentiment, in-app purchases and device support there is nothing between them.

Metric Conversion tool is free to download; Drill and Tap Tool costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Metric Conversion tool holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Metric Conversion tool has 15K ratings behind it against 30, so its average is the more settled of the two. Written reviews complicate that: 73% of Drill and Tap Tool's written reviews are positive against 69% of Metric Conversion tool's, so the app with the better star average is not the one people write more warmly about.

Drill and Tap Tool ships an update every 6 weeks, Metric Conversion tool fortnightly. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Drill and Tap Tool | Metric Conversion tool |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.3 (30 ratings)](https://appshunter.io/ios/app/drill-and-tap-tool-thread-tapping-and-through-hole/id421763062/reviews) | **[4.8 (15K ratings)](https://appshunter.io/ios/app/metric-conversion-tool/id1439430070/reviews)** |
| Number of ratings | 30 | **15K** |
| Positive reviews | **73.2% of reviews** | 69.2% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 57 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chewy Applications](https://appshunter.io/developer/415417492) | [Wight Hat](https://appshunter.io/developer/1425885740) |

## What reviewers say

### Drill and Tap Tool

[App page](https://appshunter.io/ios/app/drill-and-tap-tool-thread-tapping-and-through-hole/id421763062)

Calculate the correct drill bit size for your tapping operations. Supports various thread types and inch/metric measurements. Provides precise calculations for depth of thread and clearance.

**Highlights:** Metric and US Standard tap/drill support, Spinning dial interface for easy selection, Calculates drill size for tapping, Supports various thread types (UNC, UNF, NPT, BSP, etc.), Provides drill sizes in Metric, Inch, and US No./Letter, Calculates percentage depth of thread, Calculates through-hole clearance

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

**In-app purchases:** none


### 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.)


## Frequently asked questions

### Is Drill and Tap Tool free?

Drill and Tap Tool costs $1.99, with no in-app purchases.

### Is Metric Conversion tool free?

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

### Which has better reviews, Drill and Tap Tool or Metric Conversion tool?

Metric Conversion tool is rated higher. Drill and Tap Tool averages 4.3 out of 5 from 30 ratings, while Metric Conversion tool averages 4.8 from 15K ratings.

### Do Drill and Tap Tool or Metric Conversion tool have ads?

Metric Conversion tool shows ads; Drill and Tap Tool does not.

### Which is updated more often, Drill and Tap Tool or Metric Conversion tool?

Drill and Tap Tool ships an update every 6 weeks, and Metric Conversion tool fortnightly. Most recently, Drill and Tap Tool was updated on October 26, 2026 and Metric Conversion tool on October 28, 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.*