BookMoves vs Color
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BookMoves
Master chess openings with a unique blend of theory, computer science, and spaced repetition. Memorize hundreds of variants for both sides and transition from rote learning to intuitive application. Overcome the forgetting curve with an innovative technique for lasting mastery.
- Chess opening theory
- Spaced repetition learning
- Hundreds of chess variants
- Statistical probabilities
- Integrated scoring system
- Algorithmic improvement
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Embark on a transformative chess journey with our groundbreaking app, seamlessly blending Opening Theory, Computer Science, and Space Repetition. Easily memorize hundreds of chess variants for both white and black, transitioning from rote memorization to intuitive application of knowledge. Overcome the Forgetting Curve using our innovative Space Repetition technique, converting short-term storage into lasting mastery. Access a comprehensive database of 1 million+ opening variants, each accompanied by statistical probabilities. Our integrated scoring system considers game statistics and parameters for effective play, constantly evolving to provide you with the strongest advantage at your current skill level. Experience the power of continuous algorithmic improvement, ensuring you stay ahead in every game. Optimized for mobile, our app lets you practice openings anytime, anywhere, enhancing your skills on the move. Unleash your chess potential by consistently training with new openings, conveniently accessible through your mobile browser. Elevate your game, break free from stagnation, and become the chess pro you aspire to be. Start your journey to mastery today!
Color
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Color-Clock is a unique clock that translates time into color. The more hours, the more red, more minutes more green, more seconds more blue. Every second a different color! Give your old cell phone a new life as a stylish desk clock. No sim card needed. It will run all day on airplane mode, even with the screen always on. Share a particular beautiful color as png with your friends. The RGB values will be added too, so you can use it later in your own designs. Manipulate time with the Science Fiction mode. Challenge your friends: who can be the first to share the clock showing the time from one hour ago? HOW IT WORKS The dial continuously changes color throughout the day. Red indicates the hours, green the minutes, and blue the seconds. The values range from 0 (dark) to 255 (bright) – just like in design software. For example: it is 8:40 and 20 seconds. 8 hours is one-third of 24 hours, so red is one-third of 255. 40 minutes is two-thirds of 60, so green is two-thirds of 255. And 20 seconds is one-third of 60, so blue is one-third of 255, or 85. But wait, one second later, blue is 89! Once you get used to it, you may look forward to the colors in a particular part of the day. COLOR SCHEMES Switch between six color schemes: RGB, RBG, GRB, GBR, BRG, and BGR. Each scheme assigns the three color channels to hours, minutes, and seconds in a different order, creating a completely different color palette for the same moment. FEATURES - Analog clock with colored hands that correspond to the active color scheme - RGB value display showing the exact color composition - Six color schemes to choose from - Speed modes: 3x, 15x, 60x, 300x and 500x to see colors change quickly - Freeze mode: pause to capture a color you like and share it. - Share: share the current clock as a PNG image - SF (Science Fiction) mode: switching between color schemes does not change color, but time! - Picture-in-Picture: keep the clock visible as a floating window - Always On: keep the screen active as long as the app is open - Full screen: now the clock stands out beautifully DESIGNED BY Color-Clock is designed by Peter Ritmeester / PZZL.com — known for innovative puzzles and brain games. Free to use. No ads. No data collection.
Screenshots
Verdict
The clearest difference is update cadence: Color at every 9 days against BookMoves's every 3 weeks. BookMoves's advantage is iOS requirement (13.0 vs 15.0). 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.
BookMoves ships an update every 3 weeks, Color every 9 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.
| Parameter | BookMoves | Color |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 70 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Regulus Team s.r.o. | PZZL.com |
In-app purchases
BookMoves
No in-app purchases
Color
No in-app purchases








