# Calculation vs Dottie

The clearest difference is ads: Dottie at none against Calculation's shown. Dottie also leads on update cadence (every 9 days vs every 2 months). Calculation's advantage is iOS requirement (16.0 vs 26.1). On price, 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.

Calculation ships an update every 2 months, Dottie every 9 days. The most recent releases landed on September 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Calculation | Dottie |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 7 MB | 10 MB |
| Requires iOS | **16.0** | 26.1 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SooRyong Hyun](https://appshunter.io/developer/1685604103) | [Arno Richter](https://appshunter.io/developer/1883018646) |

## What reviewers say

### Calculation

[App page](https://appshunter.io/ios/app/calculation-basic-calculator/id6462632655)

**In-app purchases:** none


### Dottie

[App page](https://appshunter.io/ios/app/dottie-time-and-countdowns/id6761264423)

**In-app purchases:** none


## Frequently asked questions

### Is Calculation free?

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

### Is Dottie free?

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

### Do Calculation or Dottie have ads?

Calculation shows ads; Dottie does not.

### Which is updated more often, Calculation or Dottie?

Calculation ships an update every 2 months, and Dottie every 9 days. Most recently, Calculation was updated on September 11, 2026 and Dottie on September 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.*