RainbowSky vs CaffTime Tutor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RainbowSky
Read full descriptionHide full description
Your e-books, your pedagogy. Cater your student's need. RainbowOne lets you create your own e-Learning materials and hold a truly interactive and engaging e-lesson. E-books can be easily created and adjusted freely to suit your needs. Our interactive e-lesson equipped with functions which helps you to save time. Exercises can be auto-corrected, and the learning data are analyzed to let you know more about your students’ ability. And the most important is, it is fun! Innovative e-Book Editor: Total Design Freedom We offer 80+ comprehensive tool and 10000+ images for you to tailor-make your e-books. You can start with a free canvas or choose from our templates. With easy drag and drop you can customize anything. Cross-platform lesson: Interact with your students Lesson can be held in a cross-platform environment. You can group your students and hold a competition, voting or discussion. We also provide page-sync, black-out screen and other functions that helps you manage your class. Instant Charts: Know your students well All questions with pre-set answers are instantly corrected. Learning data are automatically collected and analyzed. You can easily find out the learning difficulties of your students. Bookstore with editable e-books Share your knowledge! Here we have a bookstore for you to share your materials in public, and you can read the e-books from the bookstore to get some inspiration, or even download and edit it to suit your needs.
CaffTime Tutor
Read full descriptionHide full description
Turn homework and worksheet questions into clear, easy-to-follow steps—not just answers to copy. Type a question, take a photo, upload up to three images, or add a PDF of up to three pages. CaffTime Tutor helps you understand how to solve each problem. It breaks the solution down and explains each step along the way. KEY FEATURES • Ask questions with text, photos, or a PDF • Get help across a range of subjects • Choose a Quick or Detailed response • Receive answers in different languages • Keep a question history and revisit previous questions at any time
Screenshots
Verdict
The clearest difference is in-app purchases: RainbowSky at none against CaffTime Tutor's 3. RainbowSky also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, 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
Both are free to download. CaffTime Tutor sells 3 one-off in-app purchases. RainbowSky asks for nothing beyond the download.
RainbowSky ships an update every 2 weeks, CaffTime Tutor every 3 weeks. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.
| Parameter | RainbowSky | CaffTime Tutor |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 292 MB | 48 MB |
| Age rating | 4+ | 12+ |
| Developer | Open Knowledge Association Ltd. | Chun Yu Chow |
In-app purchases
RainbowSky
No in-app purchases
CaffTime Tutor
- CaffTime Credit$4.99
- CaffTime Credit$8.99
- CaffTime Credit$14.99
Questions
Is RainbowSky free?
Is CaffTime Tutor free?
Do RainbowSky or CaffTime Tutor have ads?
Which is updated more often, RainbowSky or CaffTime Tutor?
Other comparisons
