Comparison

Transformers Rescue Bots vs Lios Calibre Viewer

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

Head to head
About

Transformers Rescue Bots

Join the Transformers Rescue Bots in an interactive storybook adventure to save Griffin Rock from ravenous plants. Become a cadet, help the Burns family, and practice early reading skills with engaging animations and voices.

Highlights
  • Interactive storybook adventure
  • Transformers Rescue Bots characters
  • Read to me and Read along modes
  • Quality animation
  • Problem-solving skill development
  • Early literacy practice
Features
Currently charting
Read full description

When a new Sky Forest tower is constructed in Griffin Rock, the city finds itself under attack by ravenous plants! It’s time for the TRANSFORMERS RESCUE BOTS to roll to the rescue, but when they need help, who is going to save them? TRANSFORMERS RESCUE BOTS: SKY FOREST RESCUE is an interactive storybook adventure that puts early and emerging readers at the center of the action on every page. Optimus Prime introduces the story and invites the reader to join the adventure as a new cadet on the Griffin Rock Rescue team. The reader meets Cody and the rest of the Burns family as they work with the TRANSFORMER RESCUE BOTS to save the town and the Sky Forest from some very hungry vegetation! TRANSFORMERS RESCUE BOTS: SKY FOREST RESCUE is an interactive storybook app from PlayDate Digital, with #1 book apps in over 30 countries! It’s an exciting way for young readers to practice their skills while living an adventure! Key Features: •Interactive TRANSFORMERS RESCUE BOTS action and voices on every page! •The entire Rescue Bots Team, Blades, Boulder, Chase, and Heatwave change modes at the touch of your finger. •You are at center of the story! •Quality animation brings story live! •Includes Read to me and Read along modes for every level of early readers •Introduction by Optimus Prime! •Take your picture with the TRANSFORMERS RESCUE BOTS when you complete the mission! Learning Goals This app provides exciting opportunities for young readers to acquire skills and knowledge in the following areas: Problem-solving skills •Learn how to be a team member while solving challenges within the narrative •Understand the importance and value of every team member’s contribution •Models problem solving strategies including: analyzing situations and understanding options to choose the best solution Emergent and early literacy •Expand early reading skills •Increase reading comprehension •Learn new vocabulary Assist young readers’ critical transition from learning to read to reading to learn. ABOUT PLAYDATE DIGITAL PlayDate Digital Inc. is a publisher of high-quality, interactive, mobile educational software for children. PlayDate Digital's products nurture children's emerging literacy and creativity skills by turning digital screens into engaging experiences. PlayDate Digital content is built in partnership with some of the world's most trusted global brands for kids. Visit us: playdatedigital.com Like us: facebook.com/playdatedigital Follow us: @playdatedigital Watch all our app trailers: youtube.com/PlayDateDigital1 HAVE QUESTIONS? We'd love to hear from you! Your questions suggestions and comments are always welcome. Contact us 24/7 at info@playdatedigital.com

About

Lios Calibre Viewer

Access and read your entire book collection from your computer on your iPad or iPhone. Organize books by category and download them for offline reading, saving device space. Browse your library quickly with locally stored book names and cover art.

Highlights
  • Stream Calibre library
  • Download books for offline reading
  • Organize books by category
  • Quick library browsing
  • Save device space
Features
Read full description

View your entire calibre library streamed from your host computer to your iPad or iPhone. Download the books to the device and read the books anywhere. Organize your books by category or by the books you choose to download. Your entire library of book names and cover art are stored locally for quick browsing. The books are only downloaded on device when you choose to download them, saving space on your phone or tablet.

Screenshots

Transformers Rescue Bots4 screens
Lios Calibre Viewer4 screens

Verdict

The call

The clearest difference is review sentiment: Lios Calibre Viewer at 100% against Transformers Rescue Bots's 31%. Lios Calibre Viewer also leads on rating (4.3 vs 3.6) and update cadence (every 5 days vs every 12 months). Transformers Rescue Bots's advantage is chart position (#114 vs unranked) and ratings volume (15 vs 3). On price, ads, in-app purchases and monetization model 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

Transformers Rescue Bots costs $2.99 and Lios Calibre Viewer $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Lios Calibre Viewer holds the better App Store score, 4.3 against 3.6. That said, the two scores are not equally well evidenced: Transformers Rescue Bots has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 31% of Transformers Rescue Bots's written reviews are positive against 100% of Lios Calibre Viewer's.

UpkeepUpdate frequency

Transformers Rescue Bots ships an update every 12 months, Lios Calibre Viewer every 5 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 5 level
Transformers Rescue Bots versus Lios Calibre Viewer: the parameters behind the verdict, then further details
ParameterTransformers Rescue BotsLios Calibre Viewer
Price$2.99$2.99
Rating3.6 (15 ratings)4.3 (3 ratings) — better
Positive reviews30.9% of reviews100.0% of reviews — better
Number of ratings15 — better3
Update frequencyEvery 12 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#114 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size682 MB11 MB
Age rating4+4+
DeveloperPlayDate Digital Inc.Antonio Torres

Customer experience

Transformers Rescue Bots

All ratings15 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews68 reviews
Positive30.9%
Neutral2.9%
Negative66.2%

Lios Calibre Viewer

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Transformers Rescue Bots

Reported bugs

5 issues
  • App crashes at a certain point
  • App keeps closing down
  • Sound not working
  • Audio not working
  • App crashes when taking picture

Requested features

6 requests
  • Update to fix crashing when taking photo
  • Allow saving of Rescue Bot photos at the end
  • Add original voices from the show
  • More interaction and game play
  • Add more stories or levels
Show 1 more
  • Translate to other languages (e.g., German)

Lios Calibre Viewer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Transformers Rescue Bots

No in-app purchases

None

Lios Calibre Viewer

No in-app purchases

Questions

Is Transformers Rescue Bots free?
Transformers Rescue Bots costs $2.99, with no in-app purchases.
Is Lios Calibre Viewer free?
Lios Calibre Viewer costs $2.99, with no in-app purchases.
Which has better reviews, Transformers Rescue Bots or Lios Calibre Viewer?
Lios Calibre Viewer is rated higher. Transformers Rescue Bots averages 3.6 out of 5 from 15 ratings, while Lios Calibre Viewer averages 4.3 from 3 ratings.
Do Transformers Rescue Bots or Lios Calibre Viewer have ads?
Neither Transformers Rescue Bots nor Lios Calibre Viewer shows ads.
Which is updated more often, Transformers Rescue Bots or Lios Calibre Viewer?
Transformers Rescue Bots ships an update every 12 months, and Lios Calibre Viewer every 5 days. Most recently, Transformers Rescue Bots was updated on November 1, 2026 and Lios Calibre Viewer on October 30, 2026.

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