# Screw Size Drill Bit Chart vs Smart Unit Converter Plus

The clearest difference is in-app purchases: Smart Unit Converter Plus at none against Screw Size Drill Bit Chart's 3. Smart Unit Converter Plus also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Screw Size Drill Bit Chart sells 3 in-app purchases, starting at $2.99 per 7 days. Smart Unit Converter Plus asks for nothing beyond the download.

## The numbers

| Metric | Screw Size Drill Bit Chart | Smart Unit Converter Plus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 23 MB | 22 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [海彬 唐](https://appshunter.io/developer/6771846427) |

## What reviewers say

### Screw Size Drill Bit Chart

[App page](https://appshunter.io/ios/app/screw-size-drill-bit-chart/id6772276125)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Countersink Pro, Weekly | $2.99 | per 7 days |
| Thread Finder, Yearly | $14.99 | per year |
| Full Fastener Guide, One-Time | $29.99 | one-time |


### Smart Unit Converter Plus

[App page](https://appshunter.io/ios/app/smart-unit-converter-plus/id6787842603)

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

**In-app purchases:** none


## Frequently asked questions

### Is Screw Size Drill Bit Chart free?

Screw Size Drill Bit Chart is free to download, with in-app purchases available.

### Is Smart Unit Converter Plus free?

Smart Unit Converter Plus is free to download, with no in-app purchases.

### Do Screw Size Drill Bit Chart or Smart Unit Converter Plus have ads?

Neither Screw Size Drill Bit Chart nor Smart Unit Converter Plus shows ads.

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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.*