# Time Duration/Add Calculator vs Simple Date Calculator

The clearest difference is price: Time Duration/Add Calculator at Free against Simple Date Calculator's $0.99. Time Duration/Add Calculator also leads on iOS requirement (13.0 vs 17.0). Simple Date Calculator's advantage is ads (none vs shown) and update cadence (every 2 months vs every 9 months). On in-app purchases and device support there is nothing between them.

Time Duration/Add Calculator is free to download; Simple Date Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Time Duration/Add Calculator ships an update every 9 months, Simple Date Calculator every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Time Duration/Add Calculator | Simple Date Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/time-durationadd-calculator/id1521417824/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 17 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [Zhiqi Pan](https://appshunter.io/developer/1893386703) |

## What reviewers say

### Time Duration/Add Calculator

[App page](https://appshunter.io/ios/app/time-durationadd-calculator/id1521417824)

Easily calculate elapsed time between two points or determine an end time based on a start time and duration. It also converts time into various units like days, hours, minutes, and seconds.

**Highlights:** Calculate elapsed time from start and end times, Calculate end time from start time and elapsed duration, Display time between start and end dates/times, Convert time into days, hours, minutes, and seconds, Easily enter current time, Calculate time before a given duration

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Date Calculator

[App page](https://appshunter.io/ios/app/simple-date-calculator/id6762223333)

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

**In-app purchases:** none


## Frequently asked questions

### Is Time Duration/Add Calculator free?

Time Duration/Add Calculator is free to download, with no in-app purchases.

### Is Simple Date Calculator free?

Simple Date Calculator costs $0.99, with no in-app purchases.

### Do Time Duration/Add Calculator or Simple Date Calculator have ads?

Time Duration/Add Calculator shows ads; Simple Date Calculator does not.

### Which is updated more often, Time Duration/Add Calculator or Simple Date Calculator?

Time Duration/Add Calculator ships an update every 9 months, and Simple Date Calculator every 2 months. Most recently, Time Duration/Add Calculator was updated on October 24, 2026 and Simple Date Calculator on October 25, 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.*