# 8051 Tutorial Pro vs Thread Pitch Calculator

The clearest difference is in-app purchases: Thread Pitch Calculator at none against 8051 Tutorial Pro's 10. 8051 Tutorial Pro's advantage is update cadence (every 6 months vs every 51 months) and price ($1.99 vs $4.99). On ads, device support and iOS requirement there is nothing between them.

8051 Tutorial Pro costs $1.99 and Thread Pitch Calculator $4.99 up front. 8051 Tutorial Pro sells 10 one-off in-app purchases. Thread Pitch Calculator asks for nothing beyond the download.

8051 Tutorial Pro ships an update every 6 months, Thread Pitch Calculator every 51 months. The most recent releases landed on September 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 8051 Tutorial Pro | Thread Pitch Calculator |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | — | **[1.8 (4 ratings)](https://appshunter.io/ios/app/thread-pitch-calculator/id1382184074/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 16.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 51 months |
| Monetization | — | Paid |
| Size | 17 MB | 2 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### 8051 Tutorial Pro

[App page](https://appshunter.io/ios/app/8051-tutorial-pro/id1041770722)

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 18B20 | $0.99 | one-time |
| 24L01 | $0.99 | one-time |
| MPU6050 | $0.99 | one-time |
| OLED | $0.99 | one-time |
| ESP8266 | $1.99 | one-time |
| DHT22 project | $1.99 | one-time |
| DHT11 project | $1.99 | one-time |
| BMP180 project | $1.99 | one-time |
| BMP280 project | $1.99 | one-time |
| automation (BT) project | $1.99 | one-time |


### Thread Pitch Calculator

[App page](https://appshunter.io/ios/app/thread-pitch-calculator/id1382184074)

Easily measure the thread pitch of various screws and bolts directly on your device's screen. This utility app calibrates automatically to your screen width for accurate measurements of metric, US, NPT, and BSPT threads.

**Highlights:** Measure thread pitch on screen, Automatic screen width calibration, Supports metric thread sizes, Supports US thread sizes, Supports NPT and BSPT threads, Measures metric screw sizes

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

**In-app purchases:** none


## Frequently asked questions

### Is 8051 Tutorial Pro free?

8051 Tutorial Pro costs $1.99, and also offers in-app purchases.

### Is Thread Pitch Calculator free?

Thread Pitch Calculator costs $4.99, with no in-app purchases.

### Do 8051 Tutorial Pro or Thread Pitch Calculator have ads?

Neither 8051 Tutorial Pro nor Thread Pitch Calculator shows ads.

### Which is updated more often, 8051 Tutorial Pro or Thread Pitch Calculator?

8051 Tutorial Pro ships an update every 6 months, and Thread Pitch Calculator every 51 months. Most recently, 8051 Tutorial Pro was updated on September 16, 2026 and Thread Pitch Calculator on September 29, 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.*