# Days Counter (Countdown Days) vs Mathify

The clearest difference is in-app purchases: Mathify at none against Days Counter (Countdown Days)'s 1. Mathify also leads on ads (none vs shown). Days Counter (Countdown Days)'s advantage is iOS requirement (13.0 vs 16.4). On price and device support there is nothing between them.

Both are free to download. Days Counter (Countdown Days) sells 1 one-off in-app purchase. Mathify asks for nothing beyond the download.

## The numbers

| Metric | Days Counter (Countdown Days) | Mathify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | — |
| Size | 31 MB | 44 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [庆鸿 林](https://appshunter.io/developer/1558629938) | [Vinayak Dhadda](https://appshunter.io/developer/1887483788) |

## What reviewers say

### Days Counter (Countdown Days)

[App page](https://appshunter.io/ios/app/days-counter-countdown-days/id1587592197)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Membership | $9.99 | one-time |


### Mathify

[App page](https://appshunter.io/ios/app/mathify-ai-calculator/id6797204233)

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

**In-app purchases:** none


## Frequently asked questions

### Is Days Counter (Countdown Days) free?

Days Counter (Countdown Days) is free to download, with in-app purchases available.

### Is Mathify free?

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

### Do Days Counter (Countdown Days) or Mathify have ads?

Days Counter (Countdown Days) shows ads; Mathify does not.

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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.*