Comparison

82億分の1 vs 2択　~Left or Right~

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

Head to head

About

82億分の1

Compete globally to achieve the highest score by tapping to hit a set probability. Aim for the world's best score and test your tapping speed in a special mode. Compete for world records in 5 or 10-second bursts.

Highlights

Set tap probability
Score based on hits
Global score competition
Aim for world's best
Rapid tap mode
World record attempts

Features

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自分で1タップするときに当たる確率を設定します。当たったらその数がスコアに。スコアの大きさを全国で競って、世界一を目指すゲーム。連打力モードも搭載。 5秒または10秒間でのタップ力で世界記録を目指そう！

About

2択　~Left or Right~

Features

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誰もが経験したことのある、決定的場面での2択。運命が変わる2択の連続を体験できるアプリです。＝遊び方＝遊び方はとってもシンプル。左か右かどちらかのボタンを押す。正解なら全てのボタンを押すと7が揃い、次へとチャレンジできます。又、現在の2択連続成功確率が出る為、ヒリつけること間違いなし！？＝抽選方法＝ゲーム開始時に左ファーストが正解か、右ファーストが正解かが設定されます。例えば、正解が左ファーストに選択された場合、左ボタンの次に右ボタンを押すと、2確となります。逆に、正解が右ファーストに選択された時に、左ボタンの次に右ボタンを押すと、2殺となります。 ※6択の概念はありません。＝ランキング機能実装＝連続成功記録をランキングボードにアップ、見ることができます。貴方の連続記録をランキングとしてアップすることで、全国の猛者達と競い、高め合いましょう！運も実力の内！？目指せランキング上位！！

Screenshots

82億分の14 screens

2択　~Left or Right~4 screens

Verdict

The call

The clearest difference is ads: 82億分の1 at none against 2択　~Left or Right~'s shown. 2択　~Left or Right~'s advantage is update cadence (weekly vs every 5 months) and iOS requirement (12.0 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

82億分の1 ships an update every 5 months, 2択　~Left or Right~ weekly. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 5 level

82億分の1 versus 2択　~Left or Right~: the parameters behind the verdict, then further details
Parameter	82億分の1	2択　~Left or Right~
Price	Free	Free
Positive reviews	100.0% of reviews	—
Update frequency	Every 5 months	Weekly — better
Ads	No — better	Yes
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	15.6	12.0 — better
Further details — not scored
Size	65 MB	115 MB
Age rating	4+	4+
Developer	Ikumi NAKAMURA	Masaaki Okajima

In-app purchases

None

82億分の1

No in-app purchases

None

2択　~Left or Right~

No in-app purchases

Questions

Is 82億分の1 free?

82億分の1 is free to download, with no in-app purchases.

Is 2択　~Left or Right~ free?

2択　~Left or Right~ is free to download, with no in-app purchases.

Do 82億分の1 or 2択　~Left or Right~ have ads?

2択　~Left or Right~ shows ads; 82億分の1 does not.

Which is updated more often, 82億分の1 or 2択　~Left or Right~?

82億分の1 ships an update every 5 months, and 2択　~Left or Right~ weekly. Most recently, 82億分の1 was updated on October 15, 2026 and 2択　~Left or Right~ on October 13, 2026.