# User Calendar vs when

The clearest difference is ads: when at none against User Calendar's shown. when also leads on update cadence (every 10 days vs every 5 weeks) and monetization model (free vs ad-supported). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for User Calendar against 5.0 for when. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

User Calendar ships an update every 5 weeks, when every 10 days. The most recent releases landed on August 9, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | User Calendar | when |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/user-calendar/id1459396489/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/when-usa/id6447483467/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 10 days** |
| Monetization | Ad-supported | **Free** |
| Size | 13 MB | 3 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yihang Huang](https://appshunter.io/developer/1451896625) | [uto toshiki](https://appshunter.io/developer/876927513) |

## What reviewers say

### User Calendar

[App page](https://appshunter.io/ios/app/user-calendar/id1459396489)

A versatile calendar app for managing work, vacations, and reminders. It offers Gregorian and Lunar calendar views, customizable alerts, and cloud storage for settings. Supports a wide range of countries and allows for custom holiday designations.

**Highlights:** Gregorian and Lunar calendar query, Customizable reminders with color-coding, System calendar integration, Cloud storage for settings, Customizable holidays and workdays, Country-specific calendar information

**Features:** macOS Compatibility

**In-app purchases:** none


### when

[App page](https://appshunter.io/ios/app/when-usa/id6447483467)

Easily calculate dates and durations with a smart, intuitive interface. Avoid errors with dedicated input pads and clear, readable fonts. Designed for quick and stress-free date calculations.

**Highlights:** Smart date and duration calculation, Dedicated input pads for accuracy, OCR font style for readability, Quick error display, Customizable icons (iOS 10.3+), Dark theme support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is User Calendar free?

User Calendar is free to download, with no in-app purchases.

### Is when free?

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

### Which has better reviews, User Calendar or when?

User Calendar and when are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do User Calendar or when have ads?

User Calendar shows ads; when does not.

### Which is updated more often, User Calendar or when?

User Calendar ships an update every 5 weeks, and when every 10 days. Most recently, User Calendar was updated on August 9, 2026 and when on June 4, 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.*