StudyPerks vs Earth Rotation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StudyPerks
Read full descriptionHide full description
StudyPerks unlocks deals and discounts around town as a reward for your hard work in school. For participating schools and merchants only.
Earth Rotation
Explore a 3D simulation of celestial bodies. Adjust rotation speeds, reverse direction, and alter lighting angles. Choose from three distinct Earth visual styles for an interactive learning experience.
- Adjustable rotation speed
- Reverse rotation direction
- Adjustable sun lighting angle
- Three Earth visual styles
- 3D celestial animation
Read full descriptionHide full description
This is a 3D animation in which the sun, the earth, and the moon rotate. -You can change the rotation speed. The fastest is 1 second, and the slowest is 300 seconds to make one revolution. -It can rotate in the reverse direction, which is not possible in the natural world. -The earth and the moon can change the light from the sun by 30 degrees. -There are three types of earth: night lights, nature, and globes.
Screenshots
Verdict
The clearest difference is price: StudyPerks at Free against Earth Rotation's $0.99. StudyPerks also leads on update cadence (every 6 weeks vs every 22 months) and iOS requirement (9.0 vs 15.0). On ads, in-app purchases 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
StudyPerks is free to download; Earth Rotation costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
StudyPerks ships an update every 6 weeks, Earth Rotation every 22 months. The most recent releases landed on December 5, 2025 and September 21, 2026 respectively.
| Parameter | StudyPerks | Earth Rotation |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 81 MB | 46 MB |
| Age rating | 4+ | 17+ |
| Developer | Avosis, LLC | Masahiro Tomosada |
In-app purchases
StudyPerks
No in-app purchases
Earth Rotation
No in-app purchases
Questions
Is StudyPerks free?
Is Earth Rotation free?
Do StudyPerks or Earth Rotation have ads?
Which is updated more often, StudyPerks or Earth Rotation?
Other comparisons
