Comparison

Memory King vs Osmo Words Explorers

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Memory King

This is a free memory card matching game suitable for all ages. It offers customizable gameplay with magic cards, single and multiplayer modes, and the ability to create your own card sets. Track player stats and enjoy multi-sensory learning options.

Highlights
  • Free to play
  • Up to four players
  • Magic cards for unique gameplay
  • Create custom memory cards
  • Adjustable game difficulty
  • Single and multiplayer modes
  • Player statistics tracking
Features
Read full description

★★★★★ "Wow... the best memory game in the App Store bar none and it's free! Our family has always loved playing memory cards and this is by far the best version yet. It's even more fun and addictive than the physical board game, especially given the huge number of cards. The addition of magic cards is also a huge plus! What an awesome twist to a famous classic. Highly recommended." Endorsed by tens of thousands of satisfied parents, teachers, and kids the world over. Who is this for? Memory King is the first and only memory cards game that is truly suitable for people of all ages. Memory King is a fun exercise for your mind regardless of age. We have send kids, parents, grandparents, and teachers playing the game non stop. Who knew that sharpening your mind could be this addictive?! :-) About Memory King ♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡ Memory King is by far the most amazing memory cards matching game yet: ✔ Memory King is FREE no strings attached ✔ Up to four players can play at one time ✔ Magic cards make gameplay totally unique and addictive ✔ Create your own memory cards from your photo library ✔ Fully customizable - you can adjust and customize everything imaginable Features: ♡♡♡♡♡♡♡♡♡♡♡♡♡♡ ✔ Select exactly how many pairs to include per game – 2 to 32 pairs supported ✔ Includes over 60 gorgeous memory cards (toys and animals) for FREE ✔ Can upgrade and buy additional memory cards from a collection of 800 beautifully crafted cards - upgrades only cost $0.99 for 200+ cards at a time ✔ Single player mode optimized for learning ✔ Multiplayer mode supports one to four players at a time ✔ Magic cards make this game totally unique. Special effect #1 is called "Total Recall" and if you find this card, you quickly get a glimpse of all the cards that were previously revealed. Special effect #3 is called "Crystal Ball" and for just a second you get to see all of the cards that are left in the game. While we think that magic cards make the game more fun and unpredictable, you can use this button to turn them ON or OFF. Please note that you need to have at least 8 pairs included in the game for the memory cards to appear. ✔ Tracks player stats - find out exactly how each player performed at the end of each game ✔ Customizations enable unique game modes such as "audio only." Hide the visual pictures and play memory cards only by audio to sharpen a completely separate area of your brain. Customization options: ♡♡♡♡♡♡♡♡♡♡♡♡♡♡ ✔ Create your own memory cards using your own pictures ✔ Decide exactly what effects to include in each game ✔ Can use classic (counting pairs only) or enhanced score keeping (which gives bonuses for speed and finding multiple pairs in a row correctly) ✔ Select exactly which memory cards to include in each game ✔ This app is FULLY customizable - you can record everything in your own voice! ✔ Multi-sensory learning tool - combining audio, voice, and written words ✔ Multi-language support. You can update all critical audio files so that you child can play the game regardless of their native language Heroic Support ♡♡♡♡♡♡♡♡♡♡♡♡♡♡ Heroic Support is not just what we do. It's really what makes us, well, us. It's that drive to make a difference in your life - no matter how big or small. Really, it's our way of life because we want you to be our customer for a lifetime of fun and learning. support@alligatorapps.com

About

Osmo Words Explorers

This educational game immerses children in an ancient temple adventure where they build words to battle monsters and save historical artifacts. It's designed to teach literacy skills like spelling, word recognition, and vocabulary to young learners.

Highlights
  • Word recognition
  • Spelling practice
  • Vocabulary building
  • Critical thinking
  • Historical facts
  • Monster battles
Read full description

Osmo Words Explorers & The Tunnel of Treasures Build words, battle monsters, and save the ancient treasures! In Words Explorers, kids go on a temple adventure. To progress, they must master increasingly more challenging word constructions. Along the way they’ll confront monsters, battle the boss, have a blast and -- if their skills are sharp -- save real artifacts! Osmo Words Explorers is a word-building and spelling adventure designed to teach literacy skills for kids in grades 1-3. Using your existing Osmo Base for iPad and Words tiles, this digital-only extension is a great add-on to your Osmo system. Includes: - Word recognition - Spelling practice - Word patterns - Vocabulary building - Sight words - Critical thinking - Creative problem-solving - History & social studies EXPLORE AN ANCIENT TEMPLE Two adventurous Agoutis need your help to save ancient artifacts! Tunnel through a crumbling temple, using words skills to pass through barriers and battle monsters. With each level completed, save a real Mesoamerican artifact! BUILD LITERACY SKILLS Get creative with Osmo Words tiles by replacing one letter at a time to form new words! Every time you spell a word correctly, the blocks fall and you get closer to battling the boss and saving an artifact. This word pattern, spelling and vocabulary game is perfect for kids ages 6-9. Challenges get harder as kids progress. LEARN HISTORICAL FACTS With every level completed, you save an ancient Aztec artifact! Learn about the double-headed serpent, Moctezuma’s Headdress, the Stone of Tizoc, and more. THINK FAST, GET CREATIVE The final step to recovering each artifact is to battle a new monster with the power of words. In this challenge, you’ll need to get creative to make new words out of just a few letter tiles. Think fast to get to the artifact before the monster can! *Play your favourite Osmo Words Explorers on both iPhone and iPad! Use your iPhone with the Osmo Base for iPad and Words tiles - each can be found at playosmo.com. * Please see our device compatibility list here: https://support.playosmo.com/hc/articles/115010156067 * Compatible iPhones: iPhone 12, 12 Pro, 12 Pro Max iPhone 13, 13 Pro, 13 Pro Max iPhone 14, 14 Plus * Not compatible: iPhone 14 Pro, 14 Pro Max iPhone 12 Mini,13 Mini iPhone SE (1-3) iPhone 11 Series and older *Requires use of Osmo iPad Base and Words tiles. Visit www.playosmo.com to learn more. Features: - Easy-to-use interface for children - Simple verbal instructions - Warm, colorful character animations About Osmo: Osmo is using the screen to create a new healthy, hands-on learning experience that promotes creativity, problem solving and social interaction.

Screenshots

Memory King4 screens
Osmo Words Explorers4 screens

Verdict

The call

The clearest difference is review sentiment: Memory King at 91% against Osmo Words Explorers's 17%. Memory King also leads on rating (4.4 vs 3.3) and ratings volume (332 vs 59). On price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Memory King sells 3 one-off in-app purchases and Osmo Words Explorers sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Memory King holds the better App Store score, 4.4 against 3.3. That said, the two scores are not equally well evidenced: Memory King has 332 ratings behind it against 59, so its average is the more settled of the two. Written reviews point the same way: 91% of Memory King's written reviews are positive against 17% of Osmo Words Explorers's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

Scorecard4 real differences · 6 level
Memory King versus Osmo Words Explorers: the parameters behind the verdict, then further details
ParameterMemory KingOsmo Words Explorers
PriceFreeFree
Rating4.4 (332 ratings) — better3.3 (59 ratings)
Positive reviews91.0% of reviews — better17.4% of reviews
Number of ratings332 — better59
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS4.3 — better15.0
Further details — not scored
Size39 MB263 MB
Age rating4+4+
DeveloperInnovative Mobile AppsTangible Play

Customer experience

Memory King

All ratings332 ratings
Positive85.2%
Neutral6.6%
Negative8.1%
Written reviews111 reviews
Positive91.0%
Neutral3.6%
Negative5.4%

Osmo Words Explorers

All ratings59 ratings
Positive54.2%
Neutral5.1%
Negative40.7%
Written reviews23 reviews
Positive17.4%
Neutral8.7%
Negative73.9%

Bugs and requests

Memory King

Reported bugs

2 issues
  • Cards not always opening when tapped
  • Scores not always accurate due to tapping issues

Requested features

3 requests
  • Add more card categories (e.g. sight words, rhyming, numbers)
  • Improve layout and card size for larger screens
  • Provide a free version with fewer features

Osmo Words Explorers

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Memory King

One-time3
  • Animal Cards Expansion Pack$0.99
  • First Words Expansion Pack$0.99
  • Core Concepts Expansion Pack$0.99
2 purchases

Osmo Words Explorers

One-time2
  • 3-day trial of Words ExplorerFree
  • Unlock Words Explorers$9.99

Questions

Is Memory King free?
Memory King is free to download, with in-app purchases available.
Is Osmo Words Explorers free?
Osmo Words Explorers is free to download, with in-app purchases available.
Which has better reviews, Memory King or Osmo Words Explorers?
Memory King is rated higher. Memory King averages 4.4 out of 5 from 332 ratings, while Osmo Words Explorers averages 3.3 from 59 ratings.
Do Memory King or Osmo Words Explorers have ads?
Neither Memory King nor Osmo Words Explorers shows ads.
Which is updated more often, Memory King or Osmo Words Explorers?
Memory King ships an update every 3 months, and Osmo Words Explorers every 3 months. Most recently, Memory King was updated on November 8, 2026 and Osmo Words Explorers on November 9, 2026.

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