# OmniCalc vs Chain Calculator

The clearest difference is update cadence: OmniCalc at every 3 days against Chain Calculator's monthly. Chain Calculator's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OmniCalc ships an update every 3 days, Chain Calculator monthly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OmniCalc | Chain Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/omnicalc-calculator-and-notes/id6760615662/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | Free | — |
| Size | 4 MB | 18 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [飞龙 杨](https://appshunter.io/developer/1686016407) | [seongkuk park](https://appshunter.io/developer/1895828986) |

## What reviewers say

### OmniCalc

[App page](https://appshunter.io/ios/app/omnicalc-calculator-and-notes/id6760615662)

This calculator app allows you to add notes to numbers and calculations, group related results for easy totaling, and keep projects separate. It features a searchable history and customizable appearance options for everyday math needs.

**Highlights:** Add notes to numbers and calculations, Total multiple results with one tap, Keep projects separate with calculation pages, Searchable and reusable calculation history, Live result previews and customizable appearance, Offline functionality

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

**In-app purchases:** none


### Chain Calculator

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

**In-app purchases:** none


## Frequently asked questions

### Is OmniCalc free?

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

### Is Chain Calculator free?

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

### Do OmniCalc or Chain Calculator have ads?

Neither OmniCalc nor Chain Calculator shows ads.

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

OmniCalc ships an update every 3 days, and Chain Calculator monthly. Most recently, OmniCalc was updated on October 31, 2026 and Chain Calculator on November 5, 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.*