# CalAdvent vs DaysUntilWhen

The clearest difference is in-app purchases: CalAdvent at none against DaysUntilWhen's 1. CalAdvent also leads on iOS requirement (15.6 vs 17.0). DaysUntilWhen's advantage is update cadence (monthly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. DaysUntilWhen sells 1 one-off in-app purchase. CalAdvent asks for nothing beyond the download.

CalAdvent ships an update every 4 months, DaysUntilWhen monthly. The most recent releases landed on October 26, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | CalAdvent | DaysUntilWhen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/daysuntilwhen/id6472242936/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 9 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eric Smith](https://appshunter.io/developer/415133551) | [Robert J Sarvis Jr](https://appshunter.io/developer/1531648349) |

## What reviewers say

### CalAdvent

[App page](https://appshunter.io/ios/app/caladvent/id1439383338)

**Features:** macOS Compatibility

**In-app purchases:** none


### DaysUntilWhen

[App page](https://appshunter.io/ios/app/daysuntilwhen/id6472242936)

Track the days remaining until important events with customizable home screen widgets. This app helps you visualize your countdowns for holidays and other significant dates, keeping you informed and excited.

**Highlights:** Customizable widgets, Holiday countdowns, Home screen display, Event tracking, User-requested features

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Holiday Alerts | $1.99 | one-time |


## Frequently asked questions

### Is CalAdvent free?

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

### Is DaysUntilWhen free?

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

### Do CalAdvent or DaysUntilWhen have ads?

Neither CalAdvent nor DaysUntilWhen shows ads.

### Which is updated more often, CalAdvent or DaysUntilWhen?

CalAdvent ships an update every 4 months, and DaysUntilWhen monthly. Most recently, CalAdvent was updated on October 26, 2026 and DaysUntilWhen on October 14, 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.*