Comparison

must be one vs 모아세

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

Head to head
About

must be one

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must be one is a number puzzle built on a single rule — the one in its name. A grid of numbers. Four operators. Combine neighboring tiles with arithmetic and collapse the whole board down to a single 1. That's the entire game: all becomes one. It reads as obvious for about three moves. Then it doesn't. - One rule, no filler — no twenty-minute tutorial, no menus to dig through. You understand it in seconds and spend the rest of your time actually thinking. - Always solvable — every stage is generated so that a solution is guaranteed to exist before you ever see it. If you're stuck, that's on you, not the board. - A climb that keeps widening — early stages stay in single digits; later ones open the range up and the arithmetic gets meaner. - Free, and quick to pick up. One stage on the train; look up an hour later. From office-canard — a one-person studio making small, system-first games. If this one gets its hooks in, there are more small games where it came from.

About

모아세

Features
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같은 그림의 타일 세 장을 모아 보관함을 비우고, 포근한 소풍을 이어가세요. 모아세는 7칸 보관함을 활용해 한 수씩 고민하는 타일 퍼즐입니다. 처음 만나는 규칙은 쉬운 안내로 배우고, 내 속도에 맞춰 즐길 수 있어요. 15가지 테마의 300개 스테이지에서 새로운 그림과 퍼즐 규칙을 만나보세요. 겹친 타일을 열고, 돌을 깨고, 리본과 덩굴을 풀어 길을 찾으세요. 그림이 달라도 같은 고리로 연결된 카드는 함께 움직입니다. 챕터 5에서는 포장된 카드를 드러낸 뒤, 매치를 두 번 더 만들어 포장을 열고 안의 그림을 찾아야 해요. 별 기록으로 시간과 힌트·되돌리기 사용을 돌아보며 더 좋은 기록에 도전할 수 있어요. 마을 지도에서는 여우, 곰, 토끼 친구를 만나고 장식품을 원하는 자리에 놓아 나만의 마을을 꾸밀 수 있어요. 240단계를 클리어하면 기존 지도에 다섯 번째 구역이 열리고, 새 장식 12종을 모을 수 있습니다. 친구를 눌러 이야기를 나누고, 첫 카드 맞추기부터 새 구역 열기까지 여행 퀘스트를 따라가세요. 매일 미션을 완료해 재도전 기회를 받고, 7일 연속 방문하면 특별 선물을 받을 수 있어요. 잔잔한 음악과 효과음, 되돌리기와 힌트로 내게 맞게 플레이하세요. 재도전이 더 필요하면 선택형 보상 광고로 추가 기회를 받을 수 있습니다. 광고는 선택 사항이며, 강제 광고와 인앱 결제는 없습니다. 한국어와 영어를 지원합니다.

Screenshots

must be one4 screens
모아세3 screens

Verdict

The call

The clearest difference is ads: 모아세 at none against must be one's shown. 모아세 also leads on update cadence (every 2 days vs every 5 weeks). must be one's advantage is iOS requirement (15.6 vs 17.0). 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

must be one ships an update every 5 weeks, 모아세 every 2 days. The most recent releases landed on October 6, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 3 level
must be one versus 모아세: the parameters behind the verdict, then further details
Parametermust be one모아세
PriceFreeFree
Update frequencyEvery 5 weeksEvery 2 days — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size6 MB171 MB
Age rating4+4+
Developeroffice-canard gamesSeongMin Seo

In-app purchases

None

must be one

No in-app purchases

None

모아세

No in-app purchases

Questions

Is must be one free?
must be one is free to download, with no in-app purchases.
Is 모아세 free?
모아세 is free to download, with no in-app purchases.
Do must be one or 모아세 have ads?
must be one shows ads; 모아세 does not.
Which is updated more often, must be one or 모아세?
must be one ships an update every 5 weeks, and 모아세 every 2 days. Most recently, must be one was updated on October 6, 2026 and 모아세 on October 29, 2026.

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