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.
Ninja Sekai
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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.
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.
- 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
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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
Verdict
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
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.
Both ship on a similar rhythm, roughly daily. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.
| Parameter | Ninja Sekai | Robo 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 frequency | Daily | Daily |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Best chart rank | #172 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 380 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Kyran Amantay | Red Sprite Studios |
In-app purchases
Ninja Sekai
No in-app purchases
Robo Attack for Watch
No in-app purchases
Questions
Is Ninja Sekai free?
Is Robo Attack for Watch free?
Do Ninja Sekai or Robo Attack for Watch have ads?
Which is updated more often, Ninja Sekai or Robo Attack for Watch?
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