# Think & Action vs Whale Mark

The clearest difference is iOS requirement: Think & Action at 13.0 against Whale Mark's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Think & Action sells 2 in-app purchases, starting at $1.99 per month and Whale Mark sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Think & Action ships an update every 2 months, Whale Mark every 4 months. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Think & Action | Whale Mark |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | — | Freemium |
| Size | 41 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [奇奇 郭](https://appshunter.io/developer/1696538006) | [柱 杨](https://appshunter.io/developer/1680327782) |

## What reviewers say

### Think & Action

[App page](https://appshunter.io/ios/app/think-and-action/id6476620784)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly VIP | $1.99 | per month |
| Yearly VIP | $14.99 | per year |


### 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 |


## Frequently asked questions

### Is Think & Action free?

Think & Action is free to download, with in-app purchases available.

### Is Whale Mark free?

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

### Do Think & Action or Whale Mark have ads?

Neither Think & Action nor Whale Mark shows ads.

### Which is updated more often, Think & Action or Whale Mark?

Think & Action ships an update every 2 months, and Whale Mark every 4 months. Most recently, Think & Action was updated on October 10, 2026 and Whale Mark on October 11, 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.*