# Notify Mobile App vs Big Number Calendar

The clearest difference is ads: Notify Mobile App at none against Big Number Calendar's shown. Notify Mobile App also leads on iOS requirement (13.4 vs 15.1). Big Number Calendar's advantage is update cadence (every 9 days vs every 3 weeks). On price, in-app purchases and device support there is nothing between them.

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

Notify Mobile App ships an update every 3 weeks, Big Number Calendar every 9 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Notify Mobile App | Big Number Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Size | 28 MB | 58 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jan Hrdy](https://appshunter.io/developer/1685832569) | [daehyun sung](https://appshunter.io/developer/6785252586) |

## What reviewers say

### Notify Mobile App

[App page](https://appshunter.io/ios/app/notify-mobile-app/id6448720164)

**Features:** macOS Compatibility

**In-app purchases:** none


### Big Number Calendar

[App page](https://appshunter.io/ios/app/big-number-calendar/id6785252584)

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

**In-app purchases:** none


## Frequently asked questions

### Is Notify Mobile App free?

Notify Mobile App is free to download, with no in-app purchases.

### Is Big Number Calendar free?

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

### Do Notify Mobile App or Big Number Calendar have ads?

Big Number Calendar shows ads; Notify Mobile App does not.

### Which is updated more often, Notify Mobile App or Big Number Calendar?

Notify Mobile App ships an update every 3 weeks, and Big Number Calendar every 9 days. Most recently, Notify Mobile App was updated on October 27, 2026 and Big Number Calendar on October 31, 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.*