Comparison

Polylino vs Safe to Play

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

Head to head
About

Polylino

A multilingual digital picture book app designed for educators to use in early childhood classrooms. It offers a library of age-appropriate books with read-aloud or listen options in various languages, supporting emergent literacy and curriculum goals.

Highlights
  • Multilingual digital picture book library
  • Supports emergent literacy
  • Culturally diverse books
  • Picture books and non-fiction
  • Accessible for all students
  • Curriculum support
Features
Read full description

Bring the magic of storytime to every child with Polylino! Polylino is a multilingual digital picture book app for educators and teachers to use in the classroom for early childhood education. The digital library of books on the app supports the curriculum, and develops a child’s emergent literacy. The books available can be read aloud or listened to in different languages. This is how Polylino supports your teaching: · Gives your students access to hundreds of age-appropriate books · Offers multilingual narrations so all children can be included · Strengthens a love of reading at a young age · Supports emergent literacy · Develops a child’s ability to read · Offers culturally diverse books · Supports the Learning Foundations and curriculum · Encourages personal, social, and emotional development · Has picture books, factual books, non-fiction, and more! · Inclusive and accessible to students Read along with Polylino and include all your students during storytime. Listen to many of our books in multiple languages, so all your students can be included, no matter their home language. For questions about our service, please email: support@ilteducation.com

About

Safe to Play

Features
Read full description

Safe to Play app is essentially an electronic book with smart tools about the safety in playgrounds and recreational sports areas. The information from standards and technical reports is presented with high quality visualizations and includes changes of requirements in past years plus reliable risk assessment from top experts of the field. All information in the book is in English, German, Chinese, Latvian and Finnish. Translations to Swedish and Russian are in process. Translations to other languages are planned: French, Spanish, Portuguese. Smart tools: - Make quick bookmarks as you study. - Write notes linked to any paragraph. - Make searches with any combination of words. - Notes and bookmarks are synchronized between your devices. - Feedback opportunity directly to the author. - Automatic updates whenever requirements change or new official interpretations arise! Normative references for the information: - EN 1176:2018 Playground equipment and surfacing; all parts. - EN 1177:2018 Impact attenuating playground surfacing. - EN 15312:2010 Free access multi-sports equipment. - EN 14974:2018 Skateparks. - EN 16630:2015 Permanently installed outdoor fitness equipment. - EN 16899:2016 Sports and recreational equipment — Parkour equipment. - EN 12572-2:2017 Artificial climbing structures. - EN 16579:2018 Playing field equipment — Portable and socketed goals. - TR 16467:2013 Playground equipment accessible for all children. - TR 16879:2016 Siting of Playground and other recreational facilities. - TR 17207:2018 Framework for the competence of playground inspectors. Content of the book application: 1. Introduction: - Value of play and recreational sports areas - Backgrounds of the requirements - Responsibilities 2. Safety management - Maintenance and inspection plans - Construction projects - Documentation 3. Technical production - Materials and connections - Structural integrity - Impact attentuation 4. Safety of equipment - General safety requirements - Safety of components - Safety of playground equipment - Safety of recreational sports equipment 5. Safety of layouts - Age range and capacity - Different types of areas - Impact areas - Ancillary items - Environmental conditions 6. Inspections & maintenance - Working as an inspector - Other safety related tasks - Maintenance 7. Risk assessment - Why risk assessment is needed - Anthropometric measurements - Risk assessment methods

Screenshots

Polylino4 screens
Safe to Play4 screens

Verdict

The call

The clearest difference is in-app purchases: Polylino at none against Safe to Play's 4. Polylino also leads on update cadence (every 3 weeks vs every 2 months). Safe to Play's advantage is iOS requirement (11.0 vs 15.6). On price, ads and device support 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. Safe to Play sells 4 one-off in-app purchases. Polylino asks for nothing beyond the download.

UpkeepUpdate frequency

Polylino ships an update every 3 weeks, Safe to Play every 2 months. The most recent releases landed on September 20, 2026 and September 15, 2026 respectively.

Scorecard3 real differences · 7 level
Polylino versus Safe to Play: the parameters behind the verdict, then further details
ParameterPolylinoSafe to Play
PriceFreeFree
Rating4.2 (5 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size51 MB8 MB
Age rating4+17+
DeveloperILT Inläsningstjänst ABSafe to Play Oy

In-app purchases

None

Polylino

No in-app purchases

4 purchases

Safe to Play

One-time4
  • 1 Week$22.99
  • 4 Weeks$46.99
  • 1 Year$119.99
Show 1 more
  • 3 Years$229.99

Questions

Is Polylino free?
Polylino is free to download, with no in-app purchases.
Is Safe to Play free?
Safe to Play is free to download, with in-app purchases available.
Do Polylino or Safe to Play have ads?
Neither Polylino nor Safe to Play shows ads.
Which is updated more often, Polylino or Safe to Play?
Polylino ships an update every 3 weeks, and Safe to Play every 2 months. Most recently, Polylino was updated on September 20, 2026 and Safe to Play on September 15, 2026.

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