# Whale Mark vs 时格 倒数日

The clearest difference is update cadence: 时格 倒数日 at every 4 days against Whale Mark's every 4 months. On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Whale Mark sells 3 in-app purchases, starting at $0.99 per month and 时格 倒数日 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Whale Mark ships an update every 4 months, 时格 倒数日 every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Whale Mark | 时格 倒数日 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6780326559/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 2 MB | 47 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [柱 杨](https://appshunter.io/developer/1680327782) | [余夕(上海)网络科技有限公司](https://appshunter.io/developer/1649450554) |

## What reviewers say

### Whale Mark

[App page](https://appshunter.io/ios/app/whale-mark/id6593689945)

Track your reading progress for physical books with this e-bookmark application. Log your current page, add notes, and manage your library of paperbacks. Stay organized and never lose your place again.

**Highlights:** Track reading progress for paper books, Log current page, Add notes to books, Manage book library, E-bookmark functionality

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| Annual Membership | $2.99 | per year |
| Lifetime Membership | $3.99 | one-time |


### 时格 倒数日

[App page](https://appshunter.io/ios/app/id6780326559)

Visualize your time with a unique grid system that fills in as days pass. Track countdowns, anniversaries, and life progress with customizable widgets and Apple Watch support. Designed for Chinese users with lunar calendar support.

**Highlights:** Fillable time grid visualization, Countdown and anniversary tracking, Lock screen and home screen widgets, Apple Watch complications, Lunar calendar support for recurring events, Customizable display units (days, weeks, months, years), Data privacy with local storage and iCloud sync

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 时格 完整版 | $3.99 | one-time |


## Frequently asked questions

### Is Whale Mark free?

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

### Is 时格 倒数日 free?

时格 倒数日 is free to download, with in-app purchases available.

### Do Whale Mark or 时格 倒数日 have ads?

Neither Whale Mark nor 时格 倒数日 shows ads.

### Which is updated more often, Whale Mark or 时格 倒数日?

Whale Mark ships an update every 4 months, and 时格 倒数日 every 4 days. Most recently, Whale Mark was updated on October 30, 2026 and 时格 倒数日 on October 31, 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.*