Binary Clock Time vs Extreme Addition
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Binary Clock Time
This application displays the current time using a binary format represented by changing shades of blue circles. It includes a tutorial to help users learn how to read binary time quickly.
- Binary time display
- Color customization
- Built-in tutorial
- Watch app support
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This is the most awsomest Binary Clock. It features circles that change from one shade of blue to another which indicate the time. It can be a challenge for some people to master reading binary time but with the tutorial on the information page in this app you'll be reading it in no time. Features -Change colour of circles. -Tells the time! -Watch app
Extreme Addition
This game offers a unique approach to addition, challenging players to boost their mental calculation skills. It features three levels with increasing number complexity and timed rounds to improve speed and reasoning. The game aims to build confidence and concentration through engaging number practice.
- Unique addition mechanics
- Boosts mental calculation
- Improves speed and reasoning
- Three difficulty levels
- Timed rounds for score saving
- Enhances concentration and confidence
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Extreme Addition® is a unique and extraordinarily simple game that takes you into the world of extreme additions. You will love this game. You will boost your mental calculation and your mastery of numbers. You will gain speed of execution and reasoning. You will create automatisms. You will boost your concentration and motivation. You will gain confidence in yourself. You will not waste your time. Are you ready? So let's go! In this 3-level game, two numbers are presented to you each turn. There are 10 rounds in a game and your time is timed and saved if you have 10/10. You must add these two numbers in an extreme way. You give your answer by pressing one of the 9 digits. The answer is always a number between 1 and 9. At level 1, the two numbers presented are between 1 and 10. (8 + 7) is equal to 6 in the world of Extreme Addition®. Why? Because (8 + 7) = 15, then you separate 15 into (1 + 5) = 6 At level 2, the two numbers presented are between 10 and 99. (28 + 32) is equal to 6 in the world of Extreme Addition®. Why? Because (28 + 32) = 60, then you separate 60 into (6 + 0) = 6 At level 3, the two numbers presented are between 100 and 999. (102 + 108) is equal to 3 in the world of Extreme Addition®. Why? Because (102 + 108) = 210, then you separate 210 into (2 + 1 + 0) = 3 Will you take up the challenge? Mental arithmetic is the daily maintenance of all your mental faculties! Here are some tips to save time in your extreme additions: Tip 1 The result of adding a two-digit number with 9 is quickly obtained from this number as follows: - The number of units minus 1. - The tens digit plus 1. Examples: (25 + 9) = 34 (46 + 9) = 55 (78 + 9) = 87 Tip 2 The result of the extreme addition of 9 with any number from 1 to 9 equals that number. Examples: (4 + 9) => 4 because (4 + 9) = 13 and (1 + 3) = 4 (2 + 9) => 2 because (2 + 9) = 11 and (1 + 1) = 2 (7 + 9) => 7 because (7 + 9) = 16 and (1 + 6) = 7 (9 + 9) => 9 because (9 + 9) = 19 and (1 + 8) = 9 Tip 3 It is faster to add 245 + 637 to the extreme by doing 2 + 4 + 5 + 6 + 3 + 7. Tip 4 Try to get a maximum of 9 in the longest additions, in order to apply tip # 2. Here are all the additions to get the number 9: 1 + 8 = 9 2 + 7 = 9 3 + 6 = 9 4 + 5 = 9 Tip 5 Learn by heart your addition tables, so you no longer have to rely on your fingers to find the result! Lol. 7 + 5 = 12 8 + 4 = 12 6 + 7 = 13 8 + 5 = 13 8 + 6 = 14 7 + 8 = 15 etc ... Be positive, combative, don't give up after a single game, have fun and progress. (This game is available for WatchOS, iOS, MacOS and Apple TV)
Screenshots
Verdict
The clearest difference is ads: Extreme Addition at none against Binary Clock Time's shown. Extreme Addition also leads on update cadence (every 3 weeks vs every 13 months) and review sentiment (100% vs 76%). On price, in-app purchases and iOS requirement 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.
Binary Clock Time ships an update every 13 months, Extreme Addition every 3 weeks. Both last shipped on October 20, 2026.
| Parameter | Binary Clock Time | Extreme Addition |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (36 ratings) — better | — |
| Positive reviews | 75.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 36 — better | — |
| Update frequency | Every 13 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 4 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Aaron F Stephenson | BARTOLI JOHAN |
Customer experience
Binary Clock Time
Extreme Addition
In-app purchases
Binary Clock Time
No in-app purchases
Extreme Addition
No in-app purchases
Questions
Is Binary Clock Time free?
Is Extreme Addition free?
Do Binary Clock Time or Extreme Addition have ads?
Which is updated more often, Binary Clock Time or Extreme Addition?
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