# Chain Calculator vs DIGITCA

The clearest difference is in-app purchases: Chain Calculator at none against DIGITCA's 1. Chain Calculator also leads on iOS requirement (13.0 vs 17.0). DIGITCA's advantage is update cadence (every 2 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. DIGITCA sells 1 one-off in-app purchase. Chain Calculator asks for nothing beyond the download.

Chain Calculator ships an update monthly, DIGITCA every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Chain Calculator | DIGITCA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digitca/id6766617649/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 59 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [seongkuk park](https://appshunter.io/developer/1895828986) | [matous petran](https://appshunter.io/developer/1628862850) |

## What reviewers say

### Chain Calculator

[App page](https://appshunter.io/ios/app/chain-calculator/id6764549705)

**In-app purchases:** none


### DIGITCA

[App page](https://appshunter.io/ios/app/digitca/id6766617649)

This app provides a persistent, scrollable tape calculator that remembers every entry. Edit past numbers and see totals update live. It includes conversion tools and natural language input for calculations.

**Highlights:** Persistent scrollable tape, Editable calculations, Autosave functionality, Unit and currency converter, Natural language input, Scientific keyboard, Interactive Home Screen widget

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DIGITCA Full | $5.99 | one-time |


## Frequently asked questions

### Is Chain Calculator free?

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

### Is DIGITCA free?

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

### Do Chain Calculator or DIGITCA have ads?

Neither Chain Calculator nor DIGITCA shows ads.

### Which is updated more often, Chain Calculator or DIGITCA?

Chain Calculator ships an update monthly, and DIGITCA every 2 days. Most recently, Chain Calculator was updated on October 24, 2026 and DIGITCA on October 24, 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.*