Comparison

Grid Journey vs must be one

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

Head to head
About

Grid Journey

Solve puzzles by merging gems to forge a path through a mysterious cave. Explore new realms, including the Windy River, with over 500 levels. Revisit stages to improve scores or tackle ultimate challenges.

Highlights
  • Gem merging puzzles
  • Mysterious cave exploration
  • Over 500 levels
  • Windy River chapter
  • Score challenges
  • No-restart challenges
Features
Read full description

Merge gems to clear a path through a mysterious cave. What secrets will you uncover? Tickle your brain, as you find your way through an unknown realm! In the latest chapter, sail the Windy River! Now 500 levels to explore! With Challenges, revisit earlier stages of your journey to improve your scores. Or try the ultimate challenge, to complete an entire stage without any restarts!

About

must be one

Read full description

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.

Screenshots

Grid Journey4 screens
must be one4 screens

Verdict

The call

The clearest difference is in-app purchases: must be one at none against Grid Journey's 1. Grid Journey's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Grid Journey sells 1 one-off in-app purchase. must be one asks for nothing beyond the download.

UpkeepUpdate frequency

Grid Journey ships an update every 2 months, must be one every 5 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Grid Journey versus must be one: the parameters behind the verdict, then further details
ParameterGrid Journeymust be one
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.6
Further details — not scored
Size141 MB6 MB
Age rating9+4+
DeveloperStephen Riceoffice-canard games

In-app purchases

1 purchases

Grid Journey

One-time1
  • Upgrade to Full Game$2.99
None

must be one

No in-app purchases

Questions

Is Grid Journey free?
Grid Journey is free to download, with in-app purchases available.
Is must be one free?
must be one is free to download, with no in-app purchases.
Do Grid Journey or must be one have ads?
must be one shows ads; Grid Journey does not.
Which is updated more often, Grid Journey or must be one?
Grid Journey ships an update every 2 months, and must be one every 5 weeks. Most recently, Grid Journey was updated on November 3, 2026 and must be one on October 31, 2026.

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