Comparison

Square Panda Letter Lullaby vs Osmo Coding Duo

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

Head to head
About

Square Panda Letter Lullaby

Children create their own alphabet songs by arranging letters, experiencing tactile reinforcement and multi-sensory engagement. This app offers two modes: one for song creation and another for reviewing new words learned, bringing their unique lullabies to life.

Highlights
  • Customizable alphabet songs
  • Tactile letter reinforcement
  • Multi-sensory learning
  • Word review mode
  • Phonics and vocabulary building
  • Contextual word reinforcement with pictures
Features
Read full description

This is like no alphabet song your child will ever hear because this is a song they will create themselves! By putting letters in the tray your child experiences tactile reinforcement as they decide on letters, queue them up, and take control of their song. This is where a multi-sensory, transmedia juke-box meets a lullaby music video! Take a journey through Square Panda's imagination where any alphabet song creation is possible! Your child engages with two different modes, one to create the song and one to review the new words learned. Watch in delight as your child's lullaby comes to life! Perfect for children learning: the Alphabet, letters, letter sounds, concepts about print, word families, word endings, and vocabulary Features: 26 letters songs in hundreds of combinations for a unique alphabet song experience every time! Contextual reinforcement of words with pictures supports comprehension and vocabulary acquisition Review mode allows for children to interact with key words that appear in the song lyrics Phonics Benefits: Children learn that symbols correspond with specific phonemic sounds and when placed individually or together create brand new sounds. These sounds tied together have meaning and this meaning is the construct for the entire English language. For ages 2-3. Square Panda Playset required to play.

About

Osmo Coding Duo

This app offers a collaborative coding adventure where two players team up to solve logic puzzles and rescue pets. It introduces real-world coding concepts through engaging challenges and a fun narrative.

Highlights
  • Multistep logic problems
  • Collaborative play for two
  • Coding concept introduction
  • Pet rescue adventure
  • Osmo character interaction
Read full description

Team up with a friend to solve coding puzzles and rescue pets! The most advanced game in Osmo’s Coding Family, Coding Duo uses multistep logic problems to introduce kids to real-world coding concepts. FEATURES: Advanced Puzzles for Coding Fans Get challenged by multistep logic problems that will stretch minds and introduce them to coding concepts that are used in the real world. Collaborative Play Friends and family can play together side by side to solve coding puzzles. Use teamwork and strategy to work together towards a common goal. A Fun Rescue Adventure with Osmo Characters A scientist has lost his pets and needs your help to find them. Solve the coding challenges using your favorite Osmo characters and rescue pets across several islands and return them to their home. NOTES: * Requires the Osmo Base and Coding Blocks. Each sold separately or as part of Osmo Coding Starter Kit or Osmo Coding Family Bundle. * Compatible with most iPads. Please see our device compatibility list here: https://support.playosmo.com/hc/articles/115010156067 *About Osmo Osmo is using the screen to create a new healthy, hands-on learning experience that promotes creativity, problem-solving and social interaction. We do this with our reflective artificial intelligent technology.

Screenshots

Osmo Coding Duo4 screens

Verdict

The call

The clearest difference is review sentiment: Osmo Coding Duo at 53% against Square Panda Letter Lullaby's 0%. Osmo Coding Duo also leads on rating (3.9 vs 3.2) and ratings volume (145 vs 10). Square Panda Letter Lullaby's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (8.0 vs 15.0). 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Osmo Coding Duo holds the better App Store score, 3.9 against 3.2. That said, the two scores are not equally well evidenced: Osmo Coding Duo has 145 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 0% of Square Panda Letter Lullaby's written reviews are positive against 53% of Osmo Coding Duo's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

Scorecard6 real differences · 4 level
Square Panda Letter Lullaby versus Osmo Coding Duo: the parameters behind the verdict, then further details
ParameterSquare Panda Letter LullabyOsmo Coding Duo
PriceFreeFree
Rating3.2 (10 ratings)3.9 (145 ratings) — better
Positive reviews0.0% of reviews52.6% of reviews — better
Number of ratings10145 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.0 — better15.0
Further details — not scored
Size263 MB309 MB
Age rating4+4+
DeveloperSquare Panda Inc.Tangible Play

Customer experience

Square Panda Letter Lullaby

All ratings10 ratings
Positive50.0%
Neutral10.0%
Negative40.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Osmo Coding Duo

All ratings145 ratings
Positive71.7%
Neutral2.1%
Negative26.2%
Written reviews19 reviews
Positive52.6%
Neutral5.3%
Negative42.1%

In-app purchases

None

Square Panda Letter Lullaby

No in-app purchases

None

Osmo Coding Duo

No in-app purchases

Questions

Is Square Panda Letter Lullaby free?
Square Panda Letter Lullaby is free to download, with no in-app purchases.
Is Osmo Coding Duo free?
Osmo Coding Duo is free to download, with no in-app purchases.
Which has better reviews, Square Panda Letter Lullaby or Osmo Coding Duo?
Osmo Coding Duo is rated higher. Square Panda Letter Lullaby averages 3.2 out of 5 from 10 ratings, while Osmo Coding Duo averages 3.9 from 145 ratings.
Do Square Panda Letter Lullaby or Osmo Coding Duo have ads?
Neither Square Panda Letter Lullaby nor Osmo Coding Duo shows ads.
Which is updated more often, Square Panda Letter Lullaby or Osmo Coding Duo?
Square Panda Letter Lullaby ships an update every 2 months, and Osmo Coding Duo every 2 months. Most recently, Square Panda Letter Lullaby was updated on October 2, 2026 and Osmo Coding Duo on October 18, 2026.

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