# Whenlyy vs Date Calculator

The clearest difference is update cadence: Date Calculator at every 9 days against Whenlyy's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Whenlyy sells 1 one-off in-app purchase and Date Calculator sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Whenlyy ships an update every 4 months, Date Calculator every 9 days. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Whenlyy | Date Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/date-calculator-datemath/id6773030545/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 4 MB |
| Requires iOS | **16.6** | 17.3 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Erkmen Ergul](https://appshunter.io/developer/1798402976) | [亦彬 潘](https://appshunter.io/developer/1522872222) |

## What reviewers say

### Whenlyy

[App page](https://appshunter.io/ios/app/whenlyy/id6749324955)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Whenly Premium | $1.79 | one-time |


### Date Calculator

[App page](https://appshunter.io/ios/app/date-calculator-datemath/id6773030545)

Easily calculate the duration between two dates, with options for minute-level precision. Customize themes and languages for a personalized experience. Enjoy local calculations without needing an account.

**Highlights:** Calculate days between dates, Optional time selection for minute precision, Clean, native iOS design, Theme and language settings, Local calculation without account

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $19.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is Whenlyy free?

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

### Is Date Calculator free?

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

### Do Whenlyy or Date Calculator have ads?

Neither Whenlyy nor Date Calculator shows ads.

### Which is updated more often, Whenlyy or Date Calculator?

Whenlyy ships an update every 4 months, and Date Calculator every 9 days. Most recently, Whenlyy was updated on October 7, 2026 and Date Calculator on October 8, 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.*