# Screw Size Drill Bit Chart vs Thread Chart

The clearest difference is device support: Thread Chart at 3 against Screw Size Drill Bit Chart's 1. Thread Chart also leads on iOS requirement (15.6 vs 17.0). On price, ads and in-app purchases 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 and Thread Chart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Screw Size Drill Bit Chart | Thread Chart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 23 MB | 50 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [Sachinbhai Surani](https://appshunter.io/developer/1838685550) |

## 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 |


### Thread Chart

[App page](https://appshunter.io/ios/app/thread-chart-tap-drill-and-cnc/id6799089886)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $14.99 | one-time |


## 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 Thread Chart free?

Thread Chart is free to download, with in-app purchases available.

### Do Screw Size Drill Bit Chart or Thread Chart have ads?

Neither Screw Size Drill Bit Chart nor Thread Chart 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.*