Power One vs RRLL
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Power One
This game challenges your mental agility and speed by presenting you with four-digit numbers. You must quickly add one to each digit and input the result before the one-minute timer runs out. Compete for high scores and compare your progress on the leaderboard.
- Develops motility and speed of thinking
- Add one to each digit of a four-digit number
- Score points for correct answers
- Lose points for incorrect answers
- One-minute countdown timer
- Leaderboard for high scores
- Invite friends functionality
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The game develops motility and speed of thinking. In the beginning of the game you will see four-digit number. Add one to each digit of that number and enter result. For example: if the number 0296 appeared, so you need to enter 1307. 0 -> 1 2 -> 3 9 -> 0 6 -> 7 If the number is correct – you get 1 point. If not – lose 1 point. After the answer was entered, the next number will appear and so on, till 1-minute countdown finish. Your task to get as many points as possible. Your records will be displayed at the Leaderboard as well as your opponent’s records. Inviting friends will be possible in particular.
RRLL
This game tests dynamic visual acuity by having players tap the correct half of the screen based on visual cues. Aim to beat your high score by accurately responding within a 10-second measurement period. Improve your reaction time and precision with this engaging challenge.
- Dynamic visual acuity measurement
- 10-second testing periods
- High score tracking
- Left/right screen touch controls
- Score-based feedback
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RRLL is a game that measures dynamic visual acuity. When you start the game, the measurement for 10 seconds will start. Let's measure with the aim of updating the high score. R: Touch the right half of the screen. L: Touch the left half of the screen. Good = score + 100 / Miss = score - 100
Screenshots
Verdict
The clearest difference is price: RRLL at Free against Power One's $0.29. RRLL also leads on update cadence (every 10 months vs every 30 months) and device support (3 vs 1). Power One's advantage is rating (5.0 vs 3.0) and ads (none vs shown). On ratings volume 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
RRLL is free to download; Power One costs $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.
Power One holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Power One ships an update every 30 months, RRLL every 10 months. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.
| Parameter | Power One | RRLL |
|---|---|---|
| Price | $0.29 | Free — better |
| Rating | 5.0 (2 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 30 months | Every 10 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuri Goncharov | YUSEI MIYOSHI |
Customer experience
Power One
RRLL
In-app purchases
Power One
No in-app purchases
RRLL
No in-app purchases
