# Calendar.online vs 30 Day Reading Challenge

The clearest difference is price: Calendar.online at Free against 30 Day Reading Challenge's $3.99. Calendar.online also leads on in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.2). On ads and device support there is nothing between them.

Calendar.online is free to download; 30 Day Reading Challenge costs $3.99 up front. 30 Day Reading Challenge sells 1 one-off in-app purchase. Calendar.online asks for nothing beyond the download.

## The numbers

| Metric | Calendar.online | 30 Day Reading Challenge |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.7 (40 ratings)](https://appshunter.io/ios/app/calendaronline/id1607856409/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 94.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | — |
| Size | 65 MB | 25 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kalender.digital](https://appshunter.io/developer/1584623403) | [Javier Jimenez](https://appshunter.io/developer/1883028408) |

## What reviewers say

### Calendar.online

[App page](https://appshunter.io/ios/app/calendaronline/id1607856409)

This free online calendar facilitates team collaboration with shareable access links. Manage permissions, set passwords, and customize views for seamless group scheduling. Access your calendar from any device with a simple bookmark.

**Highlights:** Shareable access links, Role-based permissions (admin, editor, reader), Password protection for links, Customizable access link views, Dashboard for managing calendars, Device bookmarking

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

**In-app purchases:** none


### 30 Day Reading Challenge

[App page](https://appshunter.io/ios/app/30-day-reading-challenge/id6764803603)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $3.99 | one-time |


## Frequently asked questions

### Is Calendar.online free?

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

### Is 30 Day Reading Challenge free?

30 Day Reading Challenge costs $3.99, and also offers in-app purchases.

### Do Calendar.online or 30 Day Reading Challenge have ads?

Neither Calendar.online nor 30 Day Reading Challenge shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*