Janken vs インベーダー J
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Janken
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Let's do brain training with a dog! Hit the object that falls from above. Rock, Paper, Scissors, Go!
インベーダー J
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くろねこ研究所 Kuroneko Lab. クラシカルなインベーダーゲーム ネコのタンクでインベーダーを迎撃せよ スワイプして発射 Classical invaders game. Intercept the Invaders with the cat's tank. Swipe to fire. 全体のハイスコアを表示できるようにしました みんなのハイスコアを確認しよう 自分のハイスコアを更新すると全体ハイスコアに更新されます The overall high score can be displayed. Let's check everyone's high score. If you update your high score, it will be updated to the overall high score. ハイスコアに表示する名前をSettingsで指定可能です You can specify the name to be displayed in the high score in Settings. くろねこ研究所 Kuroneko Lab.
Screenshots
Verdict
The clearest difference is ads: インベーダー J at none against Janken's shown. インベーダー J also leads on update cadence (every 2 months vs every 6 months). Janken's advantage is iOS requirement (11.0 vs 15.6). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Janken ships an update every 6 months, インベーダー J every 2 months. Both last shipped on November 3, 2026.
| Parameter | Janken | インベーダー J |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 165 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Takumi Seki | takayuki atsumi |
In-app purchases
Janken
No in-app purchases
インベーダー J
No in-app purchases
