# Calc Engine vs DitSitRit

The clearest difference is update cadence: Calc Engine at daily against DitSitRit's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calc Engine sells 1 one-off in-app purchase and DitSitRit sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Calc Engine ships an update daily, DitSitRit every 2 weeks. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Calc Engine | DitSitRit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calc-engine/id1061766849/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 weeks |
| Monetization | Free | — |
| Size | 17 MB | 347 MB |
| Requires iOS | 18 | **17.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [VersaEdge Software, LLC](https://appshunter.io/developer/301294952) | [South Wall Corporation](https://appshunter.io/developer/1599019782) |

## 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 |


### DitSitRit

[App page](https://appshunter.io/ios/app/ditsitrit/id6477748076)

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add 100->450 Total | $9.99 | one-time |
| Add 100->350 Total | $9.99 | one-time |
| Add 100->650 Total | $9.99 | one-time |
| Add 100->250 Total | $9.99 | one-time |
| Add 100->750 Total | $9.99 | one-time |
| Add 100->550 Total | $9.99 | one-time |
| Add 100->Unlimited | $9.99 | one-time |
| Unlimited object storage | $59.99 | one-time |


## Frequently asked questions

### Is Calc Engine free?

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

### Is DitSitRit free?

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

### Do Calc Engine or DitSitRit have ads?

Neither Calc Engine nor DitSitRit shows ads.

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

Calc Engine ships an update daily, and DitSitRit every 2 weeks. Most recently, Calc Engine was updated on October 5, 2026 and DitSitRit on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*