Simple vs Calc Ninja
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Simple
Enjoy a classic card game experience on your smartphone. Move cards with a single tap and strategically place them in home cells. Undo moves anytime to correct mistakes and pass the time comfortably.
- One-tap card movement
- Undo functionality
- Classic FreeCell gameplay
- Comfortable play design
- Ideal for short breaks
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A simple and smooth FreeCell Solitaire game optimized for smartphones! Enjoy a classic card game whenever you have a few minutes to spare. FreeCell is perfect for a quick break, a commute, or a little brain training. Designed for easy touchscreen play, cards can be moved with a simple tap and their destination will be selected automatically. Made a mistake? Just use the Undo feature and try again. Score tracking is also supported. How to Play: FreeCell is a classic solitaire card game where the goal is to move all cards to the four Foundation piles in the upper-right corner, building each suit from Ace to King. On the tableau, cards can be stacked in descending order while alternating between red and black. The four Free Cells in the upper-left corner can temporarily hold any single card, giving you extra space to rearrange the tableau. Cards are normally moved one at a time, but by making good use of empty Free Cells and other available spaces, you can move sequences of cards more efficiently. Tips: * Try to keep your Free Cells open whenever possible. More free space gives you more options. * Move Aces and other low cards to the Foundations when it is safe to do so. * Use Undo to experiment with different moves and find your way to victory.
Calc Ninja
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Calc Ninja is a mental-math battle puzzle. Fill the blanks in each equation to strike down the oni! How to play 1. Each battle shows an equation with blank tiles, e.g. ( □ + □ ) × □ = 18. 2. Tap number tiles to fill the blanks so the equation is true. 3. A correct answer strikes the demon; a wrong answer or running out of time lets it strike you. Content - 30 scrolls across 6 ninja ranks (Shoden to Gokui) - 16 unique oni bosses with a demon gallery - Operators and parentheses stay fixed. You only place the numbers, so it is pure mental math. Great for - Adults who want daily brain training - Anyone who likes number puzzles and quick arithmetic - Fans of a Japanese ninja-and-oni theme Free to play. No account required. * This app is a work of fiction. Characters and story are not based on real people or events.
Screenshots
Verdict
The clearest difference is update cadence: Calc Ninja at monthly against Simple's every 7 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Simple ships an update every 7 months, Calc Ninja monthly. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.
| Parameter | Simple | Calc Ninja |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (63 ratings) — better | — |
| Positive reviews | 70.6% of reviews | — |
| Number of ratings | 63 — better | — |
| Update frequency | Every 7 months | Monthly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 16 MB | 118 MB |
| Age rating | 4+ | 9+ |
| Developer | KENTA OKAMURA | kotaro yamada |
In-app purchases
Simple
No in-app purchases
Calc Ninja
No in-app purchases









