# Power One vs RRLL

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.

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.

## The numbers

| Metric | Power One | RRLL |
| --- | --- | --- |
| Price | $0.29 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/power-one/id1556653574/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/rrll/id1611876569/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 30 months | **Every 10 months** |
| Monetization | Paid | **Ad-supported** |
| Size | 5 MB | 24 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuri Goncharov](https://appshunter.io/developer/1556653576) | [YUSEI MIYOSHI](https://appshunter.io/developer/1086550692) |

## What reviewers say

### Power One

[App page](https://appshunter.io/ios/app/power-one/id1556653574)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### RRLL

[App page](https://appshunter.io/ios/app/rrll/id1611876569)

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.

**Highlights:** Dynamic visual acuity measurement, 10-second testing periods, High score tracking, Left/right screen touch controls, Score-based feedback

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Power One free?

Power One costs $0.29, with no in-app purchases.

### Is RRLL free?

RRLL is free to download, with no in-app purchases.

### Which has better reviews, Power One or RRLL?

Power One is rated higher. Power One averages 5.0 out of 5 from 2 ratings, while RRLL averages 3.0 from 1 ratings.

### Do Power One or RRLL have ads?

RRLL shows ads; Power One does not.

### Which is updated more often, Power One or RRLL?

Power One ships an update every 30 months, and RRLL every 10 months. Most recently, Power One was updated on October 7, 2026 and RRLL on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*