# Calc Engine vs CalcTabs

The clearest difference is in-app purchases: CalcTabs at none against Calc Engine's 1. CalcTabs also leads on iOS requirement (15.0 vs 18). Calc Engine's advantage is ads (none vs shown) and update cadence (daily vs every 37 months). On price and device support there is nothing between them.

Both are free to download. Calc Engine sells 1 one-off in-app purchase. CalcTabs asks for nothing beyond the download.

Calc Engine ships an update daily, CalcTabs every 37 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Calc Engine | CalcTabs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/calc-engine/id1061766849/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 37 months |
| Monetization | Free | — |
| Size | 17 MB | 30 MB |
| Requires iOS | 18 | **15.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VersaEdge Software, LLC](https://appshunter.io/developer/301294952) | [Black Flame Digital LTD](https://appshunter.io/developer/1574229330) |

## What reviewers say

### Calc Engine

[App page](https://appshunter.io/ios/app/calc-engine/id1061766849)

A highly customizable calculator with advanced features like graphing, equation solving, and unit conversion. Design your own keyboards and functions to streamline your workflow across Apple devices.

**Highlights:** Customizable keyboard layouts, User-defined functions and constants, Live equation graphing, Equation solving, Extensive unit conversions, Programmer mode (hex, binary, octal), Cross-device syncing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc Engine+ | $9.99 | one-time |


### CalcTabs

[App page](https://appshunter.io/ios/app/calctabs/id6467405854)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calc Engine free?

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

### Is CalcTabs free?

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

### Do Calc Engine or CalcTabs have ads?

CalcTabs shows ads; Calc Engine does not.

### Which is updated more often, Calc Engine or CalcTabs?

Calc Engine ships an update daily, and CalcTabs every 37 months. Most recently, Calc Engine was updated on November 2, 2026 and CalcTabs on October 30, 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.*