Comparison

Ninja Sekai vs Robo Attack for Watch

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

Head to head
About

Ninja Sekai

Features
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Ninja Sekai is a game about ninjas fighting with ninjutsu. The game features a variety of cool ninjutsu that can inflict different damage on enemies based on the player's hand seal speed. The most critical aspect is that ninjutsu is divided into five attributes: Metal, Wood, Water, Fire, and Earth. These attributes have interactions, so players can use corresponding ninjutsu to counter enemies based on their chakra attributes. Additionally, ninjutsu can be categorized into different types such as offensive, defensive, and supportive. Players can upgrade their favorite ninjutsu through battle rewards, which will enhance all its attributes. The game also features various protagonists that players can recruit. Some protagonists possess strong talents, allowing players to cultivate different characters to face various enemies. As players fight against enemies of different levels, they can gradually grow from a Genin to a Chunin, eventually becoming a renowned Jonin. There are no in-app purchases or ads in the game. All resources are obtained through battles with enemies. The game will continuously update, offering richer ninjutsu, characters, and enemies, making battles increasingly fun.

About

Robo Attack for Watch

Engage in a fast-paced retro arcade shooter experience on your Apple Watch and iPhone. Blast through waves of rogue robots using classic pixel graphics and power-ups. Enjoy smooth performance and intuitive controls designed for quick bursts of gameplay.

Highlights
  • Retro arcade-style pixel graphics
  • Fast-paced enemy waves
  • Power-ups (Shield, Triple Shot, Rapid Fire, Time Freeze)
  • Crown-based Watch controls
  • Short-burst gameplay
  • Offline play
Features
Read full description

Blast waves of rogue robots in this fast-paced retro arcade shooter for Apple Watch and iPhone! Inspired by classics like Robotron and Berzerk, Robo Attack delivers thrilling gameplay in bite-sized bursts — right on your wrist or phone. Features • Retro arcade-style pixel graphics • Fast-paced enemy waves • Power-ups: Shield, Triple Shot, Rapid Fire & Time Freeze • Smooth 60fps performance on Apple Watch • Crown-based Watch controls + iPhone swipes • Retro sound effects, music & voiceovers • Short-burst gameplay perfect for mobile • Play anywhere, anytime — no internet needed • No ads and no IAP! Relive the glory days of the arcade — now on your wrist. Thanks for playing Johnno & Pete

Screenshots

Ninja Sekai4 screens
Robo Attack for Watch4 screens

Verdict

The call

The clearest difference is chart position: Ninja Sekai at #172 against Robo Attack for Watch's unranked. Ninja Sekai also leads on iOS requirement (12.0 vs 18.0). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Ninja Sekai costs $1.99 and Robo Attack for Watch $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly daily. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 9 level
Ninja Sekai versus Robo Attack for Watch: the parameters behind the verdict, then further details
ParameterNinja SekaiRobo Attack for Watch
Price$1.99$1.99
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyDailyDaily
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
Best chart rank#172 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS12.0 — better18.0
Further details — not scored
Size380 MB25 MB
Age rating4+4+
DeveloperKyran AmantayRed Sprite Studios

In-app purchases

None

Ninja Sekai

No in-app purchases

None

Robo Attack for Watch

No in-app purchases

Questions

Is Ninja Sekai free?
Ninja Sekai costs $1.99, with no in-app purchases.
Is Robo Attack for Watch free?
Robo Attack for Watch costs $1.99, with no in-app purchases.
Do Ninja Sekai or Robo Attack for Watch have ads?
Neither Ninja Sekai nor Robo Attack for Watch shows ads.
Which is updated more often, Ninja Sekai or Robo Attack for Watch?
Ninja Sekai ships an update daily, and Robo Attack for Watch daily. Most recently, Ninja Sekai was updated on October 30, 2026 and Robo Attack for Watch on October 24, 2026.

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