Millie and The Lost Key vs Atchoo!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Millie and The Lost Key
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.
- 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
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HONORS FOR MILLIE WAS HERE • A Kirkus “Best Book of the Year” Winner • A Washington Post’s “Best Apps to Give and Get” • Editor’s Choice, Children’s Technology Review THE CRITICS LOVE MILLIE “Millie offers the kind of humor that appeals to both kids and parents on different levels.” —Common Sense Media “She’s a good dog with a great set of apps." —Kirkus "My daughter 'oohed' and 'ahhed' over the adorable art, has already replayed it several times, and has asked me to download more Millie books for her.” —WIRED “Children’s storybook apps have all begun to look alike, but Megapops’ interactive reading experience Millie Was Here stands alone as the pick of the litter.” —The Horn Book GIVE US YOUR PAW AND WE’LL GIVE YOU A TREAT! Get ready to steer the action, reveal surprises, play games, and collect stickers along the way in this hilarious book app—the second in the Millie Was HereTM series. YOU'LL HOWL WITH LAUGHTER Millie is an adorable but mischievous mutt who turns real life into a real adventure, and this is her first full length story. A simple walk in New York’s Central Park quickly becomes a walk on the wild side, as you help Millie explore a “dense jungle” filled with delightful surprises. You’ll learn secrets from a “wise old unicorn,” tame “wild piranhas,” and take on a “band of pirates,” all in a quest for a priceless treasure: The Lost Key to Endless Bacon! THE TALL “TAILS” OF A SHORT DOG The Millie books combine real-life photographs with fantastical art and story elements to create far-fetched, humorous “fairytales” for kids. They’re a lighthearted, modern twist on a classic format, and everyone’s in on the joke. TEACHING OLD SKILLS USING NEW TRICKS Our goal is to use a technology to which kids are naturally drawn to foster a love of reading, promote imaginative and inferential thinking, and help kids develop cognitive, creative, language, and motor skills. Education and language specialists have found that even the most reluctant readers are enticed to read Millie’s books. THIS PUPPY WAS BORN DIGITAL The Millie Was HereTM series was created from the ground up as an interactive reading experience for iOS devices. It wasn't adapted from a book, film, or television show—so its interactivity and mixed-media design are built right into the story, not added on later. The result is interactivity that feels intuitive, natural, and fully integrated into the narrative. FEATURES • Read-along text (highlights words as they are read) • Interactivity on every page, including digital pop-ups, mini games, and more • Packed with exciting video clips and animation • Virtual stickers hidden on every page, and a sticker book for your collection • "Classroom Mode" allows educators to control the pace • Card Maker creative activity • Language Switch allows instant language changes from the home screen • Innovative “Bedtime Mode” creates a calmer experience for nighttime reading • Two reading modes allow users to choose between having the book read to them, or reading it themselves. • Original music and fun sound effects • Professional dramatic narration • Beautiful, original artwork and photography • A cute dog on every page! Millie Was Here is now available in 11 languages! PRIVACY Megapops takes children's privacy very seriously. Our apps do not collect any personal information or include in-app purchases. For more information, please see our privacy policy: www.megapops.com/privacy-policy
Atchoo!
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“Teach Me to Read” is a tool created for progressive reading practice by kids ages 5 to 7. • 3 difficulty levels and reading comprehension activities tailored to each level. • 3 font types: Stick, School and Printing Press. • 7 languages: Catalan, English (U.S. and United Kingdom), Spanish (Spain and Latin America), Italian, French, German and Portuguese (Brazil). • Confidence and autonomy: readers can explore the different levels, advancing and mastering them at their own pace. • Designed in cooperation with teachers. Tested by kids, parents and teachers. • Pedagogical design based on the Constructivist Approach and the Montessori Method. • No in-app purchases or advertising to disrupt you and your child. 100% safe for children: no access to social networks or the Internet. What will I find? ============== • Three ways of enjoying the same story: 1 For the child who still does not know how to read and needs to discover the world through simple words. 2 For the child who can read with more precision and wishes to explore more details of the story. 3 For the child who already knows how to read and is capable of fully undertaking the adventure of discovering the pleasure of reading. • Seven languages so you can switch between languages, familiarize yourself with a new one, or simply practice two mother tongues. • Reading comprehension activities tailored to each level. Learning to read is about more than pronouncing the phonemes in the alphabet and spelling words. • “Achoo!” What could happen to a ladybug when she is allergic to the plants of the forest where she lives? An original story that instills values. Much more than a book! This story is available in other languages on other apps from AucaDigital. Other benefits for the child ======================= • Thanks to the reading comprehension activities children not only know that they have understood the story, but are also able to improve their sensory-perceptual development by exercising their memory, attention, concentration and capacity for observation. • Helps children to acquire values and personal and social skills. Features ======= • Interactive illustrations that you won't be able to resist touching again and again. • An original soundtrack and audio effects during reading. • A setup menu that is easy for kids to use, available on each screen: change of font, music on/off, access to scenes, and language change. • “Teach Me to Read” is an educational app for use at home and in school. • Recommended for the reading and writing skills teaching/learning process for preschool and first grade primary school students. Privacy Policy ============ We take your privacy and that of your family seriously. We do not collect or share information about you or your children, or include third-party advertising. If you need assistance, email us at soporte@aucadigital.com Do not hesitate to comment and vote on our app once downloaded. OPINIONS OF USERS Nicely done...recommended! I really liked how you could grade content to this book, depending on the level of a child's competency. There are no IAPs or ads, and I would definitely recommend this to families and teachers. K-5 Está muy bien! Parece un cuento, pero es mucho más. Mi hija ha de cinco años mejorado la lectura y disfruta haciendo las actividades. Es genial para después que han aprendido el abc. OPINIONS ON AUCADIGITAL APPS “(…) At the beginning of the stories, there are settings that can be modified to suit the needs of a particular child. It is possible to choose from three different levels of difficulty in the text. The text can be displayed in block letters, in cursive, or in all capital letters, depending on your preference.” (http://www.funeducationalapps.com/) “(…) una de las mejores aplicaciones para niños de iPhone y iPad que hemos encontrado ya que aprovecha al máximo el uso y la posibilidad de los cuentos.” (http://appleweblog.com)
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Millie and The Lost Key | Atchoo! |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 4.7 (116 ratings) — better | — |
| Positive reviews | 94.4% of reviews | — |
| Number of ratings | 116 — better | — |
| Update frequency | Every 6 months — better | Every 38 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 332 MB | 91 MB |
| Age rating | 4+ | 4+ |
| Developer | Megapops LLC | Asuncion Munoz |
Bugs and requests
Millie and The Lost Key
Reported bugs
5 issues- 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
4 requests- More books/adventures
- More videos
- A place to use stickers
- Improve tilt-to-steer interactions
Atchoo!
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Millie and The Lost Key
No in-app purchases
Atchoo!
No in-app purchases
Questions
Is Millie and The Lost Key free?
Is Atchoo! free?
Do Millie and The Lost Key or Atchoo! have ads?
Which is updated more often, Millie and The Lost Key or Atchoo!?
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