# StampIt! vs Sentiary

The clearest difference is update cadence: Sentiary at weekly against StampIt!'s every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. StampIt! sells 2 in-app purchases, starting at $0.99 per month and Sentiary sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

StampIt! ships an update every 2 months, Sentiary weekly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | StampIt! | Sentiary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 57 MB | 16 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [DAIKI YUASA](https://appshunter.io/developer/1632691655) | [Ken Ishizaka](https://appshunter.io/developer/1883950733) |

## What reviewers say

### StampIt!

[App page](https://appshunter.io/ios/app/stampit-habit-formed/id6670320389)

This app helps you achieve goals and build habits with a fun sticker-collecting approach. Choose between stamp card or calendar tracking, and set custom notifications to stay on track. Unlock exclusive designs with a premium subscription.

**Highlights:** Goal achievement, Habit formation, Stamp card tracking, Calendar tracking, Customizable notifications, Premium design options

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $0.99 | per month |
| Premium Plan | $5.99 | one-time |


### Sentiary

[App page](https://appshunter.io/ios/app/sentiary/id6760335170)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sentiary Pro | $1.99 | per month |


## Frequently asked questions

### Is StampIt! free?

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

### Is Sentiary free?

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

### Do StampIt! or Sentiary have ads?

Neither StampIt! nor Sentiary shows ads.

### Which is updated more often, StampIt! or Sentiary?

StampIt! ships an update every 2 months, and Sentiary weekly. Most recently, StampIt! was updated on November 4, 2026 and Sentiary 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.*