# K vs Days Until

The clearest difference is in-app purchases: Days Until at none against K's 1. Days Until also leads on update cadence (daily vs weekly) and device support (3 vs 1). K's advantage is ads (none vs shown) and iOS requirement (16.0 vs 18.0). On price there is nothing between them.

Both are free to download. K sells 1 in-app purchase, starting at $1.99 per year. Days Until asks for nothing beyond the download.

K ships an update weekly, Days Until daily. The most recent releases landed on September 23, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | K | Days Until |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Daily** |
| Size | 19 MB | 31 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Kitta Co.](https://appshunter.io/developer/1896674871) | [Legal Prompt Inc.](https://appshunter.io/developer/1490746932) |

## What reviewers say

### K

[App page](https://appshunter.io/ios/app/k-card-reader/id6770570934)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Mode | $1.99 | per year |


### Days Until

[App page](https://appshunter.io/ios/app/days-until-countdown-widgets/id6803622543)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is K free?

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

### Is Days Until free?

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

### Do K or Days Until have ads?

Days Until shows ads; K does not.

### Which is updated more often, K or Days Until?

K ships an update weekly, and Days Until daily. Most recently, K was updated on September 23, 2026 and Days Until on September 13, 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.*