# Time Duration/Add Calculator vs From Time To Time

The clearest difference is review sentiment: From Time To Time at 100% against Time Duration/Add Calculator's 25%. From Time To Time also leads on rating (4.5 vs 1.0). Time Duration/Add Calculator's advantage is in-app purchases (none vs 2). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. From Time To Time sells 2 in-app purchases, starting at $1.99 per month. Time Duration/Add Calculator asks for nothing beyond the download.

From Time To Time holds the better App Store score, 4.5 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 25% of Time Duration/Add Calculator's written reviews are positive against 100% of From Time To Time's.

Both ship on a similar rhythm, roughly every 9 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Time Duration/Add Calculator | From Time To Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/time-durationadd-calculator/id1521417824/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/from-time-to-time/id1641213634/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | Every 9 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 17 MB | 9 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [JB STEVENARD](https://appshunter.io/developer/361601772) |

## 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


### From Time To Time

[App page](https://appshunter.io/ios/app/from-time-to-time/id1641213634)

Calculate the duration or interval between two dates, or determine a future or past date by adding or subtracting a specified time. Supports years, months, days, hours, and minutes for precise calculations.

**Highlights:** Calculate duration between two dates, Add/remove duration from a date, Supports years, months, days, hours, minutes, Precise interval calculations, Date difference calculator

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Premium | $1.99 | per month |
| Go Premium | $12.99 | per year |


## Frequently asked questions

### Is Time Duration/Add Calculator free?

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

### Is From Time To Time free?

From Time To Time is free to download, with in-app purchases available.

### Which has better reviews, Time Duration/Add Calculator or From Time To Time?

From Time To Time is rated higher. Time Duration/Add Calculator averages 1.0 out of 5 from 1 ratings, while From Time To Time averages 4.5 from 2 ratings.

### Do Time Duration/Add Calculator or From Time To Time have ads?

Both Time Duration/Add Calculator and From Time To Time show ads.

### Which is updated more often, Time Duration/Add Calculator or From Time To Time?

Time Duration/Add Calculator ships an update every 9 months, and From Time To Time every 9 months. Most recently, Time Duration/Add Calculator was updated on November 3, 2026 and From Time To Time on November 3, 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.*