# Screw Size Drill Bit Chart vs Thread Gauge

The clearest difference is in-app purchases: Thread Gauge at none against Screw Size Drill Bit Chart's 3. Thread Gauge also leads on update cadence (every 6 days vs monthly). On price, ads, device support and iOS requirement 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. Thread Gauge asks for nothing beyond the download.

Screw Size Drill Bit Chart ships an update monthly, Thread Gauge every 6 days. The most recent releases landed on September 18, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Screw Size Drill Bit Chart | Thread Gauge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thread-gauge/id6781018381/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 4 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [Imad Jawad](https://appshunter.io/developer/6781018383) |

## 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 Gauge

[App page](https://appshunter.io/ios/app/thread-gauge/id6781018381)

This app transforms your iPhone into a precise thread measurement tool. Simply photograph a screw next to a reference card to accurately determine its pitch and diameter, identifying the closest standard in both metric and imperial units.

**Highlights:** Measures metric and imperial threads, Identifies closest standard match, Uses reference card for scale, On-screen guidance for photography, Offline processing, no data tracking

**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 Thread Gauge free?

Thread Gauge is free to download, with no in-app purchases.

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

Neither Screw Size Drill Bit Chart nor Thread Gauge shows ads.

### Which is updated more often, Screw Size Drill Bit Chart or Thread Gauge?

Screw Size Drill Bit Chart ships an update monthly, and Thread Gauge every 6 days. Most recently, Screw Size Drill Bit Chart was updated on September 18, 2026 and Thread Gauge on August 16, 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.*