Comparison

Zerko vs Roterra Just Puzzles

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Zero-sum number puzzles
  • Strategic block placement
  • Relaxing gameplay
  • No time pressure
  • No in-app purchases
  • No ads
Features
Read full description

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

About

Roterra Just Puzzles

Engage in mind-bending logic mazes with this anniversary edition. Solve challenging puzzles by shifting gravity and rotating cubes to guide characters through fantastical worlds. Choose your puzzle and embrace a new perspective to overcome obstacles.

Highlights
  • Mind-bending logic mazes
  • Shifting gravity mechanics
  • Path-swapping gems
  • Unexpected switches
  • Character-based puzzles
  • Rotatable cubes
Features
Read full description

Celebrate Roterra's 5th Anniversary with a Puzzle Challenge! Get ready for mind-bending fun with this special anniversary edition of Roterra! This free version is packed with challenging puzzles featuring hidden blocks, path-swapping gems, and unexpected switches. The twist? You get to choose your puzzle. Lead Angelica, Orlando, wizards, and knights through blocky mazes filled with new puzzles and updated graphics. Roterra Just Puzzles is the perfect break from your usual gaming routine! Navigate a World Where Gravity Doesn't Apply In Roterra, the ground shifts with every move. Slide and rotate cubes to find the right path for Princess Angelica and her friends. Solve complex mazes in a fantastical world where "up" is relative and the path forward may be behind you. Sometimes, flipping your perspective reveals that the journey is more important than the destination. Choose Your Puzzle Select from a variety of challenging yet solvable puzzles featuring characters from the series that turned gaming stereotypes upside down. Play as a former damsel in distress, a villain turned hero, or a teammate turned rival. Embrace the Power of Perspective Roterra's unique puzzles encourage players to think differently. Sometimes, a simple change in perspective can be the key to solving a problem. Are you ready to embrace the challenge and celebrate five years of Roterra? The perfect game to sit down with a coffee and give your brain a tease.

Screenshots

Zerko4 screens
Roterra Just Puzzles4 screens

Verdict

The call

The clearest difference is price: Roterra Just Puzzles at Free against Zerko's $2.99. Zerko's advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume, update cadence, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Roterra Just Puzzles is free to download; Zerko costs $2.99 up front. Roterra Just Puzzles sells 1 one-off in-app purchase. Zerko asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Zerko holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 14 and 19 respectively. Written reviews point the same way: 93% of Zerko's written reviews are positive against 76% of Roterra Just Puzzles's.

UpkeepUpdate frequency

Zerko ships an update every 3 weeks, Roterra Just Puzzles every 2 weeks. The most recent releases landed on September 11, 2026 and July 5, 2026 respectively.

Scorecard6 real differences · 4 level
Zerko versus Roterra Just Puzzles: the parameters behind the verdict, then further details
ParameterZerkoRoterra Just Puzzles
Price$2.99Free — better
Rating4.9 (14 ratings) — better4.6 (19 ratings)
Positive reviews93.3% of reviews — better76.0% of reviews
Number of ratings1419 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size100 MB772 MB
Age rating4+4+
DeveloperMaciej TargoniDig-It Games

Customer experience

Zerko

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive93.3%
Neutral6.7%
Negative0.0%

Roterra Just Puzzles

All ratings19 ratings
Positive89.5%
Neutral5.3%
Negative5.3%
Written reviews25 reviews
Positive76.0%
Neutral8.0%
Negative16.0%

Bugs and requests

Zerko

Not enough reviews yet to summarise bugs or requests.

Roterra Just Puzzles

Reported bugs

3 issues
  • Puzzles not loading properly
  • Unsolvable puzzles due to layout issues
  • Camera bug preventing level completion

Requested features

2 requests
  • Option to pay to remove ads
  • Ability to turn off music

In-app purchases

None

Zerko

No in-app purchases

1 purchases

Roterra Just Puzzles

One-time1
  • Remove Ads$0.99

Questions

Is Zerko free?
Zerko costs $2.99, with no in-app purchases.
Is Roterra Just Puzzles free?
Roterra Just Puzzles is free to download, with in-app purchases available.
Which has better reviews, Zerko or Roterra Just Puzzles?
Zerko is rated higher. Zerko averages 4.9 out of 5 from 14 ratings, while Roterra Just Puzzles averages 4.6 from 19 ratings.
Do Zerko or Roterra Just Puzzles have ads?
Roterra Just Puzzles shows ads; Zerko does not.
Which is updated more often, Zerko or Roterra Just Puzzles?
Zerko ships an update every 3 weeks, and Roterra Just Puzzles every 2 weeks. Most recently, Zerko was updated on September 11, 2026 and Roterra Just Puzzles on July 5, 2026.

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