# ISO8583 Bitmap Calculator vs Crypto String

The clearest difference is price: ISO8583 Bitmap Calculator at Free against Crypto String's $0.99. ISO8583 Bitmap Calculator also leads on iOS requirement (15.0 vs 18.0). Crypto String's advantage is update cadence (every 4 months vs every 32 months). On ads, in-app purchases and device support there is nothing between them.

ISO8583 Bitmap Calculator is free to download; Crypto String costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ISO8583 Bitmap Calculator ships an update every 32 months, Crypto String every 4 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ISO8583 Bitmap Calculator | Crypto String |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/iso8583-bitmap-calculator/id607389533/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 4 MB | 0 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dario Fanjul](https://appshunter.io/developer/607389536) | [Xu Wang](https://appshunter.io/developer/1216698112) |

## 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


### Crypto String

[App page](https://appshunter.io/ios/app/crypto-string-aes-encrypt/id6754283595)

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

**In-app purchases:** none


## Frequently asked questions

### Is ISO8583 Bitmap Calculator free?

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

### Is Crypto String free?

Crypto String costs $0.99, with no in-app purchases.

### Do ISO8583 Bitmap Calculator or Crypto String have ads?

Neither ISO8583 Bitmap Calculator nor Crypto String shows ads.

### Which is updated more often, ISO8583 Bitmap Calculator or Crypto String?

ISO8583 Bitmap Calculator ships an update every 32 months, and Crypto String every 4 months. Most recently, ISO8583 Bitmap Calculator was updated on October 14, 2026 and Crypto String on October 6, 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.*