Comparison

FLOWin vs Duodoku

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

Head to head

Play Sudoku with friends

Free

🎮 Games

No ratingsView app →

About

FLOWin

Features

Read full description

Take a seat at the controls of a spaceship and collect energy by hitting the circles with the right answers. Upgrade your spaceship with energy or buy a new one. Try to get to the leaderboard with your best score!

About

Duodoku

Features

Read full description

Duodoku redefines the way you play Sudoku. Compete in fast-paced duels with your friends or players from around the world, or enjoy a calm solo session to sharpen your mind. Two game modes: Solo mode: Train your brain on endless Sudoku grids with multiple difficulty levels. Multiplayer mode: Face opponents in real-time Sudoku battles — who will solve it first? Climb the leaderboard! Earn points, rise through the ranks, and prove you’re the best Sudoku player out there. A sleek, modern design Neon-inspired effects, smooth animations, and a minimalist interface built for focus and fun. Why you’ll love Duodoku: A fresh, competitive twist on the classic Sudoku. Fast online matches. Simple, elegant, and free to play — no account required. Download Duodoku now and challenge your mind — or your friends. LICENSED APPLICATION END USER LICENSE AGREEMENT : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

FLOWin4 screens

Duodoku4 screens

Verdict

The call

The clearest difference is update cadence: Duodoku at every 3 weeks against FLOWin's every 32 months. FLOWin's advantage is iOS requirement (13.0 vs 16.4). On price, in-app purchases and device support 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. FLOWin sells 5 one-off in-app purchases and Duodoku sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FLOWin ships an update every 32 months, Duodoku every 3 weeks. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 4 level

FLOWin versus Duodoku: the parameters behind the verdict, then further details
Parameter	FLOWin	Duodoku
Price	Free	Free
Update frequency	Every 32 months	Every 3 weeks — better
Ads	—	Yes
In-app purchases	Yes	Yes
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	13.0 — better	16.4
Further details — not scored
Size	157 MB	91 MB
Age rating	12+	4+
Developer	Jan Kot	Al Firma

In-app purchases

5 purchases

FLOWin

One-time5

Starter Pack$1.99
20k Energy$1.99
50k Energy$3.99

Show 2 more

100k Energy$6.99
200k Energy$12.99

3 purchases

Duodoku

Subscriptions3

Premium Subscription$1.997 Days
Premium Subscription$3.991 Month
Premium Subscription7 Days trial$24.991 Year

Questions

Is FLOWin free?

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

Is Duodoku free?

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

Which is updated more often, FLOWin or Duodoku?

FLOWin ships an update every 32 months, and Duodoku every 3 weeks. Most recently, FLOWin was updated on October 14, 2026 and Duodoku on October 24, 2026.