Comparison

Double Number Merging vs Shadow Ninja Sudoku

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

Head to head
About

Double Number Merging

Engage your mind with a classic number-themed puzzle game. Strategically merge falling number blocks to clear space and achieve higher scores. Enjoy a fun and challenging experience anywhere, anytime, with features like daily bonuses and progress saving.

Highlights
  • Number block merging
  • Brain exercise
  • Multiple levels
  • Daily bonuses
  • Auto-save progress
  • Smash unwanted blocks
Features
Read full description

Challenge your brain and puzzle-solving skills with Double Number Merging. The game is suitable for everyone and focused on the classic number theme. With a simple design and easy-to-play mechanic, this puzzle game can give you entertainment and improve your reflexes at the same time. Use the right strategy to arrange and merge number blocks. Climb to higher ranks and prove your skills. Enjoy the game anywhere and whenever you want something fun and challenging to spend your time. Are you craving that satisfying feeling when merging multiple blocks at the same time? This fun and free puzzle game can surely bring it to you! What makes this game interesting: - Fun and challenging single-player puzzle game - Play anytime, anywhere! - Great brain exercise for all ages - Many levels to test and improve your puzzle-solving skills - Smooth and eye-catching effects - Auto-save and pause your progress when AFK - Daily bonuses How to play: - A numerical block will slowly fall from above each time - Tap to choose which column the block will fall onto - Break your own high-score by unlocking new number and merging as many blocks as possible - Use tools to smash unwanted blocks

About

Shadow Ninja Sudoku

Features
Read full description

Unleash your inner Sudoku ninja! Ninja Sudoku is your ultimate companion for solving any Sudoku puzzle effortlessly. Whether you’re stuck on a tricky grid or looking for inspiration, this app solves puzzles in seconds while offering a sleek and user-friendly experience. Perfect for beginners and Sudoku masters alike. Download now and conquer Sudoku like a pro!

Screenshots

Double Number Merging4 screens
Shadow Ninja Sudoku4 screens

Verdict

The call

The clearest difference is ads: Shadow Ninja Sudoku at none against Double Number Merging's shown. Double Number Merging's advantage is update cadence (every 3 months vs every 10 months). On price, in-app purchases, 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

Both are free to download. Double Number Merging sells 9 one-off in-app purchases and Shadow Ninja Sudoku sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Double Number Merging ships an update every 3 months, Shadow Ninja Sudoku every 10 months. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Double Number Merging versus Shadow Ninja Sudoku: the parameters behind the verdict, then further details
ParameterDouble Number MergingShadow Ninja Sudoku
PriceFreeFree
Rating3.9 (779 ratings) — better—
Positive reviews7.0% of reviews—
Number of ratings779 — better—
Update frequencyEvery 3 months — betterEvery 10 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.3
Further details — not scored
Size290 MB27 MB
Age rating4+4+
Developerpuzzle studioHesam Darvishiyan Haghighi

Bugs and requests

Double Number Merging

Reported bugs

2 issues
  • Purchased items not received
  • Freezing and crashing issues

Requested features

2 requests
  • Option to remove ads for a fee
  • Reduce frequency of ads during gameplay

Shadow Ninja Sudoku

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Double Number Merging

One-time9
  • 1000 Diamonds$0.99
  • 10 Hammers$1.49
  • 10 Switches$1.49
Show 6 more
  • 3000 Diamonds$2.99
  • 4400 Diamonds$3.99
  • Starter Pack$4.99
  • 9200 Diamonds$7.99
  • 18100 Diamonds$14.99
  • 26000 Diamonds$19.99
1 purchases

Shadow Ninja Sudoku

One-time1
  • Remove ads$4.99

Questions

Is Double Number Merging free?
Double Number Merging is free to download, with in-app purchases available.
Is Shadow Ninja Sudoku free?
Shadow Ninja Sudoku is free to download, with in-app purchases available.
Do Double Number Merging or Shadow Ninja Sudoku have ads?
Double Number Merging shows ads; Shadow Ninja Sudoku does not.
Which is updated more often, Double Number Merging or Shadow Ninja Sudoku?
Double Number Merging ships an update every 3 months, and Shadow Ninja Sudoku every 10 months. Most recently, Double Number Merging was updated on October 30, 2026 and Shadow Ninja Sudoku on October 25, 2026.

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