# MarkDays vs When · Days That Matter

The clearest difference is update cadence: When · Days That Matter at every 2 weeks against MarkDays's every 70 months. MarkDays's advantage is device support (4 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. MarkDays sells 1 one-off in-app purchase and When · Days That Matter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MarkDays ships an update every 70 months, When · Days That Matter every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | MarkDays | When · Days That Matter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/markdays-count-to-days/id1490546689/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 70 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [昊罡 姚](https://appshunter.io/developer/844772956) | [杰龙 刘](https://appshunter.io/developer/1481214183) |

## What reviewers say

### MarkDays

[App page](https://appshunter.io/ios/app/markdays-count-to-days/id1490546689)

This tool helps you remember and count down to significant life events like anniversaries, birthdays, and important schedules. Receive timely reminders so you never miss a special occasion. Track both past and future important dates.

**Highlights:** Mark important life days, Count down to events, Track past events, Timely reminders, Anniversary tracking, Birthday reminders

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock MarkedDays Professional | $4.99 | one-time |


### When · Days That Matter

[App page](https://appshunter.io/ios/app/when-days-that-matter/id1616365331)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| When Premium · Lifetime Access | $0.99 | one-time |


## Frequently asked questions

### Is MarkDays free?

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

### Is When · Days That Matter free?

When · Days That Matter is free to download, with in-app purchases available.

### Do MarkDays or When · Days That Matter have ads?

Neither MarkDays nor When · Days That Matter shows ads.

### Which is updated more often, MarkDays or When · Days That Matter?

MarkDays ships an update every 70 months, and When · Days That Matter every 2 weeks. Most recently, MarkDays was updated on November 3, 2026 and When · Days That Matter on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*