Longest River vs Zerko
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Longest River
A logic puzzle game where you create the longest possible river paths using stone blocks. Enjoy a relaxing experience with nature and piano sounds as you test your IQ and complete challenging levels.
- Create longest river paths
- Logical brain puzzle
- Relaxing soundtrack
- No time limits
- Undo button
- Suitable for adults and kids
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Are you looking for a new water flow logical puzzle? Do you want this path puzzle to be challenging and relaxing at the same time? Play Longest River, a new flow water maze puzzle in which you need to create the longest river paths using blocks of stones all while enjoying the peaceful sounds of nature and piano. Download the water connect flow puzzle now, and see if you can complete all levels. ◆ LOGICAL BRAIN PUZZLE GAME WITH RELAXING PUZZLE SOUNDS Test your IQ in this river flow puzzle game. Our river puzzle blends a flow finder, grid, and path puzzle challenge and puts you on a mind-teasing quest. Analyze the flow, and where other blocks are placed. Follow the river path length in the top left corner to see the target. Then try to achieve it to complete the level. ◆ PASS ALL LEVELS WITH GOLD In this relaxing puzzler, the current and target river path lengths are located in the top left corner. You need to achieve the bronze target in order to pass the level. But don’t settle for the basic achievement. Try to complete the gold targets and become the ultimate river puzzle master. ◆ LONGEST RIVER PUZZLE GAME FEATURES: ● make the longest river path possible ● reach the bronze target to complete the level ● aim for the gold as a top puzzle challenge ● simple drag-and-drop controls ● relaxing soundtrack that blends piano and nature sounds ● no time limits – relax in the river flow free puzzle game ● undo button ● suitable for adults and kids Now it’s time to play one of the most relaxing puzzle games for adults. If you are looking for a logical puzzle brain game with a soothing ambiance you can’t go wrong with our game.
Zerko
A relaxing puzzle game where you strategically place blocks to make all numbers on the board equal zero. Enjoy a no-pressure experience with calming audio and no in-app purchases or ads.
- Zero-sum number puzzles
- Strategic block placement
- Relaxing gameplay
- No time pressure
- No in-app purchases
- No ads
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Some call it reverse sudoku, while others call it a nullification game, but it's Zerko - a puzzle game filled with shapes, numbers, and a straightforward goal: make every number zero. To achieve this, you need to strategically place blocks of various shapes and values so that the numbers on the board effectively "remove up" to zero. Like all my games, this one too is about relaxation... Just chill. There are no points, no time pressure, no data collection, no in-app purchases, no ads, no nonsense ;) My only hope is that you'll enjoy it and that I'll be able to add new content and levels for you in the future. Relaxing audio by: Marek Koszczyński
Screenshots
Verdict
The clearest difference is price: Longest River at Free against Zerko's $2.99. Zerko's advantage is ads (none vs shown) and ratings volume (14 vs 4). On rating, review sentiment, update cadence 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
Longest River is free to download; Zerko costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Longest River against 4.9 for Zerko. Both are backed by a comparable volume of ratings — 4 and 14 respectively. Written reviews are what separate them: 100% of Longest River's written reviews are positive against 93% of Zerko's.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on July 1, 2026 and September 11, 2026 respectively.
| Parameter | Longest River | Zerko |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 5.0 (4 ratings) — better | 4.9 (14 ratings) |
| Positive reviews | 100.0% of reviews — better | 93.3% of reviews |
| Number of ratings | 4 | 14 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 40 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | Cloudberry Pine AB | Maciej Targoni |
Customer experience
Longest River
Zerko
In-app purchases
Longest River
No in-app purchases
Zerko
No in-app purchases
