Comparison

Klepsydra vs ReadStreak

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

Head to head
About

Klepsydra

Features
Read full description

Klepsydra is the very first novel with original soundtrack. Put your headphones on and, while reading, you will be immersed in a musical environment composed and performed for that novel only. You will then discover a new way of reading and you will get deep into a "page turner" fascinating historical thriller novel. Here is the pitch : "21 December 1988, 1907 hrs Three days before Christmas, an American airliner of the Panam crashes in the heart of the village of Lockerbie, in the south of Scotland, making 270 victims. After the stupor, opens the largest police investigation ever organized on the British territory. While Scotland Yard and the FBI are working together to identify the perpetrators of the tragedy, investigators are afraid of a new attack. A real race against time begins."

About

ReadStreak

This app provides a vibrant and engaging ebook library for children, featuring hundreds of stories in multiple languages. It aims to enhance language skills and cultural understanding through interactive elements and native speaker narrations in a safe, ad-free environment.

Highlights
  • Vast multilingual ebook library
  • Interactive stories with narration
  • Language learning and cultural understanding
  • Customizable reading levels
  • Safe and ad-free environment
  • Regular content updates
Features
Read full description

Welcome to ReadStreak, the Ultimate Multilingual Ebook Library for Children! Discover a world where imaginations soar and language barriers vanish. ReadStreak offers a unique, colorful, and engaging ebook experience designed for children. With a vast collection of stories in multiple languages, our app is a magical gateway to global cultures and languages. WHY READSTREAK? Diverse Library: Explore hundreds of enchanting ebooks, ranging from timeless classics to contemporary tales, all available in multiple languages including English, Spanish, French, German, Chinese, Japanese and more! Read and Learn: Each book is a new adventure! Kids can learn new languages or read in their native tongue, enhancing language skills and cultural understanding. Interactive and Engaging: Vibrant illustrations, interactive elements, and narrations bring stories to life, making reading a delightful experience. Safe and Ad-Free: Enjoy a safe, ad-free environment focused on learning and fun. KEY FEATURES: Multi-language Support: Switch languages seamlessly within the app. Voice Narration: Listen to stories narrated by native speakers. Customizable Reading Experience: Choose the reading level appropriate for your child. Regular Updates: Enjoy new books and features added regularly. Download ReadStreak now and embark on a multilingual reading adventure with your child. Foster a love for reading and languages that will last a lifetime! By downloading or using ReadStreak, you agree to our Terms of Use and Apple's standard End User License Agreement (EULA), which can be found at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Klepsydra4 screens
ReadStreak4 screens

Verdict

The call

The clearest difference is in-app purchases: Klepsydra at none against ReadStreak's 11. ReadStreak's advantage is update cadence (every 9 days vs every 28 months). On price, ads, device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ReadStreak sells 9 in-app purchases, starting at $2.99 per month. Klepsydra asks for nothing beyond the download.

UpkeepUpdate frequency

Klepsydra ships an update every 28 months, ReadStreak every 9 days. The most recent releases landed on October 27, 2026 and October 13, 2026 respectively.

Scorecard2 real differences · 7 level
Klepsydra versus ReadStreak: the parameters behind the verdict, then further details
ParameterKlepsydraReadStreak
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 28 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0.0 — better
Further details — not scored
Size251 MB48 MB
Age rating12+4+
DeveloperCyril de NanteuilReadStreak Inc

In-app purchases

None

Klepsydra

No in-app purchases

9 purchases

ReadStreak

Subscriptions6
  • Full Library Access$2.991 Month
  • Full Library Access2 variants$3.991 Month
  • Full Library Access$4.991 Month
Show 3 more
  • Full Library Access$29.991 Year
  • Full Library Access2 variants$39.991 Year
  • Full Library Access$49.991 Year
One-time3
  • Full Library Access$1.99
  • Full Library Access$4.99
  • Full Library Access$9.99

Questions

Is Klepsydra free?
Klepsydra is free to download, with no in-app purchases.
Is ReadStreak free?
ReadStreak is free to download, with in-app purchases available.
Do Klepsydra or ReadStreak have ads?
Neither Klepsydra nor ReadStreak shows ads.
Which is updated more often, Klepsydra or ReadStreak?
Klepsydra ships an update every 28 months, and ReadStreak every 9 days. Most recently, Klepsydra was updated on October 27, 2026 and ReadStreak on October 13, 2026.

Other comparisons