# Date.Time Calculator vs SJ Age Calculator

The clearest difference is price: SJ Age Calculator at Free against Date.Time Calculator's $0.99. SJ Age Calculator also leads on update cadence (every 5 days vs every 5 months). Date.Time Calculator's advantage is in-app purchases (none vs 5) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

SJ Age Calculator is free to download; Date.Time Calculator costs $0.99 up front. SJ Age Calculator sells 5 one-off in-app purchases. Date.Time Calculator asks for nothing beyond the download.

Date.Time Calculator ships an update every 5 months, SJ Age Calculator every 5 days. The most recent releases landed on October 13, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Date.Time Calculator | SJ Age Calculator |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sj-age-calculator/id6563151005/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 3 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Noriaki HASHIBA](https://appshunter.io/developer/978336077) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### Date.Time Calculator

[App page](https://appshunter.io/ios/app/datetime-calculator/id978336078)

Calculate date and time differences, intervals, and perform unit conversions with a pure calculator interface. Useful for determining future or past dates, calculating total time for multiple events, and converting between various time units and POSIX time.

**Highlights:** Date and time point calculations, Time interval calculations, Unit conversion of time, POSIX time interconversion, Time zone mutual conversion, Arithmetic operations with time

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

**In-app purchases:** none


### SJ Age Calculator

[App page](https://appshunter.io/ios/app/sj-age-calculator/id6563151005)

Quickly determine a client's age group and associated benefits based on their birth year. Ideal for professionals in industries like travel and hospitality needing to apply age-based rules instantly and accurately.

**Highlights:** Instant age group identification, Display associated rights/benefits, Customizable age groups and ranges, Manage multiple rule profiles, Fast, simple, and efficient design, Clear interface for professional use

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coffee | $0.99 | one-time |
| A cookie | $2.99 | one-time |
| No ads | $4.99 | one-time |
| A lemon tart | $4.99 | one-time |
| A pizza | $9.99 | one-time |


## Frequently asked questions

### Is Date.Time Calculator free?

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

### Is SJ Age Calculator free?

SJ Age Calculator is free to download, with in-app purchases available.

### Do Date.Time Calculator or SJ Age Calculator have ads?

SJ Age Calculator shows ads; Date.Time Calculator does not.

### Which is updated more often, Date.Time Calculator or SJ Age Calculator?

Date.Time Calculator ships an update every 5 months, and SJ Age Calculator every 5 days. Most recently, Date.Time Calculator was updated on October 13, 2026 and SJ Age Calculator on October 23, 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.*