# Days vs CompisCalculator Pro

The clearest difference is in-app purchases: Days at none against CompisCalculator Pro's 1. Days also leads on iOS requirement (8.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CompisCalculator Pro sells 1 one-off in-app purchase. Days asks for nothing beyond the download.

Days ships an update fortnightly, CompisCalculator Pro every 3 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Days | CompisCalculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/compiscalculator-pro/id6451198443/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Free |
| Size | 11 MB | 3 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mervyn Ong](https://appshunter.io/developer/682991121) | [Karl Noreland](https://appshunter.io/developer/1697120498) |

## What reviewers say

### Days

[App page](https://appshunter.io/ios/app/days-to-date/id1037184540)

**Features:** macOS Compatibility

**In-app purchases:** none


### CompisCalculator Pro

[App page](https://appshunter.io/ios/app/compiscalculator-pro/id6451198443)

A scientific calculator designed to enhance productivity with features like real-time results, unit conversion, and custom buttons. It offers a date calculator, customizable appearance, and is optimized for iPad.

**Highlights:** Real-time calculation results, Integrated unit and currency converter, Customizable buttons and functions, Date and time difference calculator, Calculation history, Customizable appearance, iPad optimization

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CompisCalculator premium | $2.49 | one-time |


## Frequently asked questions

### Is Days free?

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

### Is CompisCalculator Pro free?

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

### Do Days or CompisCalculator Pro have ads?

Neither Days nor CompisCalculator Pro shows ads.

### Which is updated more often, Days or CompisCalculator Pro?

Days ships an update fortnightly, and CompisCalculator Pro every 3 weeks. Most recently, Days was updated on October 24, 2026 and CompisCalculator Pro 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.*