# Tempus Calc vs Date Calculation Assistant

The clearest difference is in-app purchases: Tempus Calc at none against Date Calculation Assistant's 2. Date Calculation Assistant's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Date Calculation Assistant sells 2 in-app purchases, starting at $0.99 per month. Tempus Calc asks for nothing beyond the download.

Tempus Calc ships an update every 8 days, Date Calculation Assistant every 5 days. The most recent releases landed on September 19, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Tempus Calc | Date Calculation Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 5 days** |
| Size | 3 MB | 35 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ommar alquisi](https://appshunter.io/developer/1815009330) | [玉辉 黄](https://appshunter.io/developer/1852393919) |

## What reviewers say

### Tempus Calc

[App page](https://appshunter.io/ios/app/tempus-calc/id6746067882)

**Features:** macOS Compatibility

**In-app purchases:** none


### Date Calculation Assistant

[App page](https://appshunter.io/ios/app/date-calculation-assistant/id6758889725)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $5.99 | per year |


## Frequently asked questions

### Is Tempus Calc free?

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

### Is Date Calculation Assistant free?

Date Calculation Assistant is free to download, with in-app purchases available.

### Do Tempus Calc or Date Calculation Assistant have ads?

Neither Tempus Calc nor Date Calculation Assistant shows ads.

### Which is updated more often, Tempus Calc or Date Calculation Assistant?

Tempus Calc ships an update every 8 days, and Date Calculation Assistant every 5 days. Most recently, Tempus Calc was updated on September 19, 2026 and Date Calculation Assistant on September 13, 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.*