# Millie and The Lost Key vs Atchoo!

The clearest difference is update cadence: Millie and The Lost Key at every 6 months against Atchoo!'s every 38 months. Millie and The Lost Key also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Millie and The Lost Key costs $2.99 and Atchoo! $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Millie and The Lost Key ships an update every 6 months, Atchoo! every 38 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Millie and The Lost Key | Atchoo! |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[4.7 (116 ratings)](https://appshunter.io/ios/app/millie-and-the-lost-key/id452175094/reviews)** | — |
| Number of ratings | **116** | — |
| Positive reviews | 94.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 38 months |
| Monetization | Paid | — |
| Size | 332 MB | 91 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Megapops LLC](https://appshunter.io/developer/452174854) | [Asuncion Munoz](https://appshunter.io/developer/1480525311) |

## What reviewers say

### Millie and The Lost Key

[App page](https://appshunter.io/ios/app/millie-and-the-lost-key/id452175094)

Embark on a humorous adventure with a mischievous dog in this interactive digital storybook. Steer the action, uncover surprises, play games, and collect stickers in a quest for a lost key. This app fosters a love of reading and develops cognitive skills through engaging storytelling and mixed-media design.

**Highlights:** Interactive story with surprises, Mini-games and activities, Virtual sticker collection, Read-along text, Animation and video clips, Card Maker creative activity, Classroom and Bedtime Modes

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Kids love it
- 👍 Engaging and fun
- 👍 Cute character (Millie)
- 👍 Interactive features
- 👍 Educational value

**What reviewers complain about**

- 🐛 Sound is loud against narrator
- 🐛 Simplistic interactivity
- 🐛 Some bugs
- 🐛 Stickers hard to find
- 🐛 Only one video in a book

**Reported bugs**

- Update stalled
- Sticker on last page impossible to find
- Page 4 interaction not working
- Page 6 slider bug
- Cannot open story book (one instance)

**Requested features**

- More books/adventures
- More videos
- A place to use stickers
- Improve tilt-to-steer interactions


### Atchoo!

[App page](https://appshunter.io/ios/app/atchoo/id980936278)

**In-app purchases:** none


## Frequently asked questions

### Is Millie and The Lost Key free?

Millie and The Lost Key costs $2.99, with no in-app purchases.

### Is Atchoo! free?

Atchoo! costs $2.99, with no in-app purchases.

### Do Millie and The Lost Key or Atchoo! have ads?

Neither Millie and The Lost Key nor Atchoo! shows ads.

### Which is updated more often, Millie and The Lost Key or Atchoo!?

Millie and The Lost Key ships an update every 6 months, and Atchoo! every 38 months. Most recently, Millie and The Lost Key was updated on November 6, 2026 and Atchoo! on November 6, 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.*