Comparison

Waldoku vs RainEl

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

Head to head
About

Waldoku

Features
Read full description

Waldoku is a calm logic puzzle game about finding hidden dogs on a square board. Each level hides the same number of dogs as the board size. Use color areas, rows, columns, and adjacency rules to narrow down the correct tiles. The rules are simple: - Each color area has exactly one dog. - Each row has exactly one dog. - Each column has exactly one dog. - Dogs cannot touch each other. Mark tiles that cannot contain a dog with X, then double tap the tile where you think a dog is hidden. When many tiles can be ruled out at once, drag across the board to mark X quickly. The early levels introduce the rules step by step, then larger boards and combined clues add more depth. If you get stuck, hint and dog finder items can help you continue. Waldoku is designed for short puzzle sessions, careful thinking, and the satisfying moment of finding the exact answer.

About

RainEl

Features
Read full description

Forget everything you know about match-3. In Rainbow Elimination, you don't swap two balls โ€” you slide an entire row or column. The empty space moves with your swipe, and matches form perpendicular to the direction you slide. One move ripples across the whole board in a way no ordinary match game does. HOW TO PLAY โ€ข Swipe any row or column to shift the balls โ€ข 2 or more same-colored balls lining up across your swipe = a match โ€ข Matched balls vanish โ€” your goal is to clear the entire 9ร—9 grid โ€ข Stuck? Add a couple of fresh balls, or swap any two into place WHY IT'S DIFFERENT โ€ข No swapping adjacent tiles โ€” you control whole lines at once โ€ข Every swipe can trigger chains you didn't plan for โ€ข Clean, colorful, no clutter โ€” just you and the grid โ€ข Quick sessions that fit a commute or a coffee break Simple to pick up, surprisingly deep to master. Can you clear the rainbow?

Screenshots

Waldoku4 screens
RainEl3 screens

Verdict

The call

The clearest difference is ads: Waldoku at none against RainEl's shown. Waldoku also leads on update cadence (every 9 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Waldoku sells 10 one-off in-app purchases and RainEl sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Waldoku ships an update every 9 days, RainEl monthly. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

Scorecard2 real differences ยท 4 level
Waldoku versus RainEl: the parameters behind the verdict, then further details
ParameterWaldokuRainEl
PriceFreeFree
Update frequencyEvery 9 days โ€” betterMonthly
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details โ€” not scored
Size220 MB108 MB
Age rating4+4+
DeveloperSori GamesAndrey Lunevich

In-app purchases

10 purchases

Waldoku

One-time10
  • Hints x5$0.99
  • Dog Finders x5$0.99
  • Remove Ads for 24 Hours$0.99
Show 7 more
  • Dog Finders x20$2.99
  • Hints x20$2.99
  • Remove Ads for 7 Days$2.99
  • Hints x50$7.99
  • Dog Finders x50$7.99
  • Remove Ads Forever$9.99
  • Rookie detective kit$9.99
7 purchases

RainEl

One-time7
  • Welcome Offer$0.99
  • 5 Swaps$0.99
  • 5 Hints$0.99
Show 4 more
  • 15 Hints$1.99
  • Remove Ads$2.99
  • 50 Swaps$4.99
  • 50 Hints$4.99

Questions

Is Waldoku free?
Waldoku is free to download, with in-app purchases available.
Is RainEl free?
RainEl is free to download, with in-app purchases available.
Do Waldoku or RainEl have ads?
RainEl shows ads; Waldoku does not.
Which is updated more often, Waldoku or RainEl?
Waldoku ships an update every 9 days, and RainEl monthly. Most recently, Waldoku was updated on October 31, 2026 and RainEl on October 28, 2026.

Other comparisons