# ISO8583 Bitmap Calculator vs 8051 Tutorial

The clearest difference is rating: 8051 Tutorial at 5.0 against ISO8583 Bitmap Calculator's 4.5. 8051 Tutorial also leads on update cadence (every 3 months vs every 32 months) and iOS requirement (12.0 vs 15.0). ISO8583 Bitmap Calculator's advantage is in-app purchases (none vs 10). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. 8051 Tutorial sells 10 one-off in-app purchases. ISO8583 Bitmap Calculator asks for nothing beyond the download.

8051 Tutorial holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

ISO8583 Bitmap Calculator ships an update every 32 months, 8051 Tutorial every 3 months. The most recent releases landed on September 28, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | ISO8583 Bitmap Calculator | 8051 Tutorial |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/iso8583-bitmap-calculator/id607389533/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/8051-tutorial/id1043830861/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 17 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dario Fanjul](https://appshunter.io/developer/607389536) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## What reviewers say

### ISO8583 Bitmap Calculator

[App page](https://appshunter.io/ios/app/iso8583-bitmap-calculator/id607389533)

This utility helps you understand active data elements within ISO8583 messages by visualizing the bitmap. Easily enable or disable fields to see the updated bitmap representation. Supports primary, secondary, and tertiary bitmaps.

**Highlights:** Visualize active data elements, Enable/disable fields, Update bitmap in real-time, Support for primary bitmaps, Support for secondary bitmaps, Support for tertiary bitmaps

**Features:** macOS Compatibility

**In-app purchases:** none


### 8051 Tutorial

[App page](https://appshunter.io/ios/app/8051-tutorial/id1043830861)

Learn 8051 microcontroller programming in C with this comprehensive tutorial. It covers architecture, assembly, and C language, featuring 11 practical projects. An optional Pro version offers additional projects with source code and advanced features.

**Highlights:** 8051 architecture review, 8051 assembly mnemonics, 8051 C language programming, 11 practical projects, Baud calculator, Pro version with extra projects and source code

**Features:** Vision Pro support

**In-app purchases (10)**

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


## Frequently asked questions

### Is ISO8583 Bitmap Calculator free?

ISO8583 Bitmap Calculator is free to download, with no in-app purchases.

### Is 8051 Tutorial free?

8051 Tutorial is free to download, with in-app purchases available.

### Which has better reviews, ISO8583 Bitmap Calculator or 8051 Tutorial?

8051 Tutorial is rated higher. ISO8583 Bitmap Calculator averages 4.5 out of 5 from 2 ratings, while 8051 Tutorial averages 5.0 from 1 ratings.

### Do ISO8583 Bitmap Calculator or 8051 Tutorial have ads?

Neither ISO8583 Bitmap Calculator nor 8051 Tutorial shows ads.

### Which is updated more often, ISO8583 Bitmap Calculator or 8051 Tutorial?

ISO8583 Bitmap Calculator ships an update every 32 months, and 8051 Tutorial every 3 months. Most recently, ISO8583 Bitmap Calculator was updated on September 28, 2026 and 8051 Tutorial on September 26, 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.*