# Kluchi vs Summation

The clearest difference is rating: Kluchi at 5.0 against Summation's 4.2. Summation's advantage is ratings volume (58 vs 1) and review sentiment (70% vs 50%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Kluchi sells 1 one-off in-app purchase and Summation sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Kluchi holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Summation has 58 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of Kluchi's written reviews are positive against 70% of Summation's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 18, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Kluchi | Summation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kluchi/id1182879708/reviews)** | [4.2 (58 ratings)](https://appshunter.io/ios/app/summation/id1219879009/reviews) |
| Number of ratings | 1 | **58** |
| Positive reviews | 50.0% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 110 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maxim Polous](https://appshunter.io/developer/560072891) | [Lemon Jam Technology Co., Ltd.](https://appshunter.io/developer/884737211) |

## What reviewers say

### Kluchi

[App page](https://appshunter.io/ios/app/kluchi/id1182879708)

This puzzle game challenges players to strategically place all keys onto a table. Utilize unique key connectors and special "neighbors" mechanics to solve increasingly complex arrangements. Hints are available to assist when you get stuck.

**Highlights:** Key placement puzzle, Unique connector mechanics, Special 'neighbors' keys, Hint system, Brain training benefits, New puzzle type

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 9 hints | $0.99 | one-time |


### Summation

[App page](https://appshunter.io/ios/app/summation/id1219879009)

Engage your brain with a minimalistic math puzzle game. Rearrange numbers to solve increasingly challenging levels. Explore new themes and enjoy endless gameplay.

**Highlights:** Minimalistic math puzzle gameplay, Rearrange numbers to solve puzzles, Endless levels for infinite play, Unlockable game themes, Brain workout challenges

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Hints | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 🧠 Engaging puzzle mechanics with unique crossword-style addition gameplay
- 😌 Relaxing and calming experience without timers or move counters
- 🎨 Beautiful minimalist design with clean aesthetic
- 🎵 Pleasant soundtrack and sound design
- 📈 Good difficulty progression that challenges without frustrating

**What reviewers complain about**

- 📺 Excessive and intrusive full-screen video advertisements
- 💰 Ads persist even after paying for ad-free version
- 🔄 Ads interrupt gameplay and timer continues during Challenge Mode
- 🛑 Frequent app crashes and freezes, often related to ads
- 🔗 App Store opens unexpectedly multiple times during gameplay

**Reported bugs**

- Hint button freezes game and requires reinstall to fix
- Game crashes at specific levels (e.g., level 102)
- App crashes immediately upon opening with blue dot indicator
- Full-screen ads cannot be closed and trap users
- Game gets stuck in landscape mode after full-page ad

**Requested features**

- Dark mode for nighttime playing
- Multiplication puzzle variant
- Increased difficulty progression beyond level 100
- More varied puzzle structures and mechanics
- Ability to purchase larger quantities of hints at once


## Frequently asked questions

### Is Kluchi free?

Kluchi is free to download, with in-app purchases available.

### Is Summation free?

Summation is free to download, with in-app purchases available.

### Which has better reviews, Kluchi or Summation?

Kluchi is rated higher. Kluchi averages 5.0 out of 5 from 1 ratings, while Summation averages 4.2 from 58 ratings.

### Do Kluchi or Summation have ads?

Neither Kluchi nor Summation shows ads.

### Which is updated more often, Kluchi or Summation?

Kluchi ships an update every 3 weeks, and Summation every 3 weeks. Most recently, Kluchi was updated on September 18, 2026 and Summation on September 28, 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.*