Drop 10 vs Mermaid Maths
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drop 10
This educational game helps young learners practice addition by focusing on sums that equal 10. It's designed for children in 1st and 2nd grade to build foundational math skills in an engaging way.
- Addition practice
- Focus on sums to 10
- Designed for 1st and 2nd graders
- Engaging gameplay
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Drop 10 is a math game that practices summing to 10. Most children start memorizing sums to 10 around 1st grade and 2nd grade.
Mermaid Maths
This educational game helps children practice addition skills in a fun, underwater environment. Players earn treasure by solving math problems, which can then be used to customize their underwater world with new friends and backgrounds.
- Addition practice
- Earn treasure rewards
- Customize underwater scenes
- Unlock new friends
- Multiple backgrounds
- Interactive gameplay
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Mermaid Maths allows kids to practice addition while earning treasure they can use to swim with different friends under the sea! The maths exercise is at the top of the game scene, once you know the answer tap the bubble that contains it and the mermaid will swim to it. If you get it correct you gain 1 treasure. An incorrect answer will lose one treasure. Use treasure to change to one of eight different backgrounds, choose between 2 mermaids and also add up to 6 different friends to your maths practice!
Screenshots
Verdict
The clearest difference is update cadence: Drop 10 at every 18 months against Mermaid Maths's every 58 months. Drop 10 also leads on ratings volume (21 vs 1) and iOS requirement (11.0 vs 15.6). On price, rating, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Drop 10 against 5.0 for Mermaid Maths. That said, the two scores are not equally well evidenced: Drop 10 has 21 ratings behind it against 1, so its average is the more settled of the two.
Drop 10 ships an update every 18 months, Mermaid Maths every 58 months. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.
| Parameter | Drop 10 | Mermaid Maths |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (21 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 21 — better | 1 |
| Update frequency | Every 18 months — better | Every 58 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 70 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Sharyn Efimoff | L&L Programming LLC |
Customer experience
Drop 10
Mermaid Maths
In-app purchases
Drop 10
No in-app purchases
Mermaid Maths
No in-app purchases
