# Duck Stamp vs Kept By

The clearest difference is review sentiment: Kept By at 100% against Duck Stamp's 0%. Kept By also leads on rating (5.0 vs 4.4) and update cadence (every 2 months vs every 5 months). Duck Stamp's advantage is in-app purchases (none vs 1) and ratings volume (36 vs 3). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Kept By sells 1 one-off in-app purchase. Duck Stamp asks for nothing beyond the download.

Kept By holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Duck Stamp has 36 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Duck Stamp's written reviews are positive against 100% of Kept By's.

Duck Stamp ships an update every 5 months, Kept By every 2 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Duck Stamp | Kept By |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (36 ratings)](https://appshunter.io/ios/app/duck-stamp/id6738578951/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kept-by/id6769453316/reviews)** |
| Number of ratings | **36** | 3 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 61 MB | 68 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Amplex Corporation](https://appshunter.io/developer/1781230628) | [James Jackson](https://appshunter.io/developer/1896659717) |

## What reviewers say

### Duck Stamp

[App page](https://appshunter.io/ios/app/duck-stamp/id6738578951)

Support wetland conservation by purchasing annual Duck Stamps directly through the app. Explore National Wildlife Refuges, stay updated on wildlife news, and learn about the Junior Duck Stamp program. Every purchase helps preserve habitats for migratory birds and other wildlife.

**Highlights:** Purchase annual Duck Stamps, Explore National Wildlife Refuges, Access conservation news and updates, Learn about featured artists, Discover the Junior Duck Stamp program, Information for consignment partners

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

**In-app purchases:** none


### Kept By

[App page](https://appshunter.io/ios/app/kept-by/id6769453316)

Digitally preserve cherished paper memories like cards, letters, and notes. Capture images, add details like sender and occasion, and easily organize, search, and revisit your personal keepsakes.

**Highlights:** Digitally preserve paper memories, Capture front, inside, and back images, Add sender, event, date, and notes, Organize and search personal collection, Browse saved keepsakes easily

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Keepsakes | $4.99 | one-time |


## Frequently asked questions

### Is Duck Stamp free?

Duck Stamp is free to download, with no in-app purchases.

### Is Kept By free?

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

### Which has better reviews, Duck Stamp or Kept By?

Kept By is rated higher. Duck Stamp averages 4.4 out of 5 from 36 ratings, while Kept By averages 5.0 from 3 ratings.

### Do Duck Stamp or Kept By have ads?

Neither Duck Stamp nor Kept By shows ads.

### Which is updated more often, Duck Stamp or Kept By?

Duck Stamp ships an update every 5 months, and Kept By every 2 months. Most recently, Duck Stamp was updated on October 24, 2026 and Kept By on October 19, 2026.

---

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