Instant Slayer vs 1/2 one
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Instant Slayer
Test your reaction speed in this simple yet challenging game. Tap the screen as fast as possible when prompted to defeat opponents in various modes. Compete against friends or aim for a global high score.
- Tap to react quickly
- Single-player modes
- 1v1 multiplayer
- Endless mode with global rankings
- Improve reflexes
Read full descriptionHide full description
Instant Slayer is a game in which you have to fight using your reflexes. Tap the screen as quick as possible when the sign shows up! Be fast and defeat every opponents! 【Rules】 ◆ 1P mode: Fight against a series of ennemies gradually becoming stronger. The ennemies you defeated will be available in the 1v1 mode, so try to get all of them! ◆ 2P mode: This is the 1v1 mode. You can fight againt your friends. Test your reflexes with your friends to see who is the fastest! ◆ Endless mode: Defeat random enemies as long as possible. You can compare your score with people worldwide, so do your best to increase your rank! It's a very simple game, which may somehow make you feel nostalgic.. and now you can enjoy it on your phone!
1/2 one
Test your luck and strategy in this simple guessing game. Aim for consecutive correct answers with a 50/50 chance, and track your progress. You get one chance to redo a selection per streak.
- 50/50 guessing mechanic
- Consecutive correct answer tracking
- Single redo per streak
- Probability display
- Simple L/R choices
Read full descriptionHide full description
Keep picking 1/2 and chase the odds that almost never happen! A simple game: how many times in a row can you call a 50/50 correctly? ■ How to play ・Pick one of two: "L" or "R" ・On a hit, the probability of your streak so far is shown (1/2 → 1/4 → 1/8 …) ・On a miss, the streak goes into RECORDS and you start over ・Once per streak you can watch an ad to redo your choice (the answer is drawn again). Redo can be switched ON / OFF ■ Records ・RECORDS: how many times you reached each streak, and your total runs ・HISTORY: the winning side of your last 13 picks ■ Version 2.0.0 (complete remake) ・Rebuilt from the ground up with a new design ・Added hit / miss effects and haptic feedback ・After a miss, your last streak stays readable ・Redo is only offered when an ad is ready ・Supports iPad and larger text sizes ・Your existing records carry over This app shows ads (banner, interstitial and rewarded). Terms of Use: https://www.gravass.co.jp/apps/terms/ Privacy Policy: https://www.gravass.co.jp/apps/privacy/
Screenshots
Verdict
The clearest difference is ads: Instant Slayer at none against 1/2 one's shown. Instant Slayer also leads on update cadence (every 10 days vs every 2 months) and monetization model (free vs ad-supported). On price, review sentiment, 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.
Instant Slayer ships an update every 10 days, 1/2 one every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | Instant Slayer | 1/2 one |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 260 MB | 49 MB |
| Age rating | 9+ | 9+ |
| Developer | RAGNAROCK INC. | gravass, Inc. |
Customer experience
Instant Slayer
1/2 one
In-app purchases
Instant Slayer
No in-app purchases
1/2 one
No in-app purchases
Questions
Is Instant Slayer free?
Is 1/2 one free?
Do Instant Slayer or 1/2 one have ads?
Which is updated more often, Instant Slayer or 1/2 one?
Other comparisons
