# CalcTabs vs Countdown Days

The clearest difference is in-app purchases: CalcTabs at none against Countdown Days's 3. Countdown Days's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 37 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Countdown Days sells 3 in-app purchases, starting at $1.29 per month. CalcTabs asks for nothing beyond the download.

CalcTabs ships an update every 37 months, Countdown Days every 5 weeks. The most recent releases landed on October 30, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | CalcTabs | Countdown Days |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 37 months | **Every 5 weeks** |
| Size | 30 MB | 45 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Black Flame Digital LTD](https://appshunter.io/developer/1574229330) | [长宏 侯](https://appshunter.io/developer/1726037103) |

## What reviewers say

### CalcTabs

[App page](https://appshunter.io/ios/app/calctabs/id6467405854)

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

**In-app purchases:** none


### Countdown Days

[App page](https://appshunter.io/ios/app/countdown-days-events-and-widgets/id6792184671)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $1.29 | per month |
| Pro (Yearly) | $9.99 | per year |
| Pro (Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is CalcTabs free?

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

### Is Countdown Days free?

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

### Do CalcTabs or Countdown Days have ads?

CalcTabs shows ads; Countdown Days does not.

### Which is updated more often, CalcTabs or Countdown Days?

CalcTabs ships an update every 37 months, and Countdown Days every 5 weeks. Most recently, CalcTabs was updated on October 30, 2026 and Countdown Days on November 10, 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.*