# Concentration vs SumLock

The clearest difference is rating: SumLock at 5.0 against Concentration's 4.0. Concentration's advantage is ads (none vs shown) and iOS requirement (13.0 vs 17.6). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Concentration costs $0.99 and SumLock $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SumLock holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | Concentration | SumLock |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/concentration-card-game/id1462017368/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sumlock/id6786379020/reviews)** |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | — |
| Monetization | Paid | Paid |
| Size | 2 MB | 5 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ankit Shah](https://appshunter.io/developer/1462017367) | [H Valeur](https://appshunter.io/developer/621824042) |

## What reviewers say

### Concentration

[App page](https://appshunter.io/ios/app/concentration-card-game/id1462017368)

A classic memory matching card game where players flip cards to find pairs. It's suitable for all ages, offering a fun challenge for both children and adults to test their recall.

**Highlights:** Card matching gameplay, Memory testing, Solitaire or multiplayer, Challenging for adults, Good for children

**Features:** macOS Compatibility

**In-app purchases:** none


### SumLock

[App page](https://appshunter.io/ios/app/sumlock/id6786379020)

Engage your mind with a unique number puzzle game that combines logic, arithmetic, and deduction. Crack a 6-digit code within limited attempts, ensuring each guess uses unique digits that sum to a target value. Enjoy a satisfying brain workout with color-coded clues and build your winning streak.

**Highlights:** Crack 6-digit master code, Unique digit and sum challenges, Color-coded feedback clues, Build winning streaks, Daily brain workout, Haptic feedback

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Concentration free?

Concentration costs $0.99, with no in-app purchases.

### Is SumLock free?

SumLock costs $0.99, with no in-app purchases.

### Which has better reviews, Concentration or SumLock?

SumLock is rated higher. Concentration averages 4.0 out of 5 from 1 ratings, while SumLock averages 5.0 from 1 ratings.

### Do Concentration or SumLock have ads?

SumLock shows ads; Concentration does not.

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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.*