Comparison

ガチ素因数分解 vs PRIME DROP

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

Head to head
About

ガチ素因数分解

Features
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「素因数分解」がゲームになった! 素因数分解の限界に挑戦してみよう! 操作は簡単! 表示される数を素因数分解して式を入力するだけ! 正解ならその数字分のポイントが加算され、不正解だと逆に減算される。 制限時間は90秒! 君はどこまで素因数分解できるかな?

About

PRIME DROP

Features
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Divide the falling numbers by primes until they disappear. An 84 lands. Tap 2 → 2 → 3 → 7. The instant it reaches 1, the tile shatters. ■ Three ways to play - Endless: survive the rising board and chase your high score - Stages: 100 stages, each with its own goal, from "clear every star tile" to "reach a 22 combo". Every chapter twists the rules: only 2s and 3s, no 2s at all, items everywhere - Items: Bomb, Cross, ÷ Storm and Fever. Clear a tile that carries an item to trigger it, and anything it catches can set off the next one ■ This is not a math drill It is a board management puzzle. Which number do you attack first? Which tiles do you clear together? When do you deal with the expensive large primes? Guess wrong and the board chokes. ■ Divide them together Tiles that share a prime factor can be selected and divided in one move. Three at once scores nine times as much. They burst one after another, and you feel every one of them in your hand. ■ A miss will not kill you outright Press a prime that does not divide and the board rises. One mistake is not the end. The pressure builds, and pulling a collapsing board back from the edge is the best feeling in the game. ■ You can feel yourself improving At first, 84 stops you cold. After a while, 2² × 3 × 7 appears instantly. That difference becomes your score. - A few minutes per run, one-handed - Crafted haptics and effects on every clear (haptics can be turned off) - Ads are kept light, and a one-time purchase removes them for good - Game Center leaderboard supported

Screenshots

ガチ素因数分解3 screens
PRIME DROP4 screens

Verdict

The call

The clearest difference is rating: PRIME DROP at 5.0 against ガチ素因数分解's 4.6. ガチ素因数分解's advantage is ratings volume (23 vs 1) and device support (3 vs 1). 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

Both are free to download. ガチ素因数分解 sells 5 one-off in-app purchases and PRIME DROP sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

PRIME DROP holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ガチ素因数分解 has 23 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 5 level
ガチ素因数分解 versus PRIME DROP: the parameters behind the verdict, then further details
Parameterガチ素因数分解PRIME DROP
PriceFreeFree
Rating4.6 (23 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings23 — better1
Update frequencyEvery 3 weeksEvery 3 weeks
AdsYesYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size100 MB5 MB
Age rating12+4+
DeveloperChikai ItoKANTA KOKONNO

In-app purchases

5 purchases

ガチ素因数分解

One-time5
  • コイン150枚$0.99
  • コイン400枚$1.99
  • コイン1000枚$2.99
Show 2 more
  • 広告削除$4.99
  • コイン2700枚$6.99
1 purchases

PRIME DROP

One-time1
  • Remove Ads$1.99

Questions

Is ガチ素因数分解 free?
ガチ素因数分解 is free to download, with in-app purchases available.
Is PRIME DROP free?
PRIME DROP is free to download, with in-app purchases available.
Which has better reviews, ガチ素因数分解 or PRIME DROP?
PRIME DROP is rated higher. ガチ素因数分解 averages 4.6 out of 5 from 23 ratings, while PRIME DROP averages 5.0 from 1 ratings.
Do ガチ素因数分解 or PRIME DROP have ads?
Both ガチ素因数分解 and PRIME DROP show ads.
Which is updated more often, ガチ素因数分解 or PRIME DROP?
ガチ素因数分解 ships an update every 3 weeks, and PRIME DROP every 3 weeks. Most recently, ガチ素因数分解 was updated on November 3, 2026 and PRIME DROP on November 6, 2026.

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