# Whale Mark vs OnceOne

The clearest difference is update cadence: OnceOne at weekly against Whale Mark's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Whale Mark ships an update every 4 months, OnceOne weekly. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Whale Mark | OnceOne |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Freemium | — |
| Size | 2 MB | 3 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [柱 杨](https://appshunter.io/developer/1680327782) | [Dongliang Yin](https://appshunter.io/developer/1030365061) |

## 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 |


### OnceOne

[App page](https://appshunter.io/ios/app/onceone-grouping-to-do-tasks/id6744550176)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro(Monthly) | $0.99 | per month |
| Pro(Annual) | $9.99 | per year |
| Pro(Lifetime) | $24.99 | one-time |


## Frequently asked questions

### Is Whale Mark free?

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

### Is OnceOne free?

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

### Do Whale Mark or OnceOne have ads?

Neither Whale Mark nor OnceOne shows ads.

### Which is updated more often, Whale Mark or OnceOne?

Whale Mark ships an update every 4 months, and OnceOne weekly. Most recently, Whale Mark was updated on October 11, 2026 and OnceOne on October 7, 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.*