Millrace vs NumFlow
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Millrace
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Sixty-four levels. One inlet. Nothing is random. Millrace is a delivery puzzle. Each level hands you a fixed board, a queue of tiles you can see in advance, and a move budget. Tiles arrive one at a time at a single marked inlet on the edge of the grid. Your job is to build one exact value on one marked cell โ and to get it there before the budget runs out. Two ways to lose, and both are yours to avoid: โข Slide a tile over the inlet and the next arrival has nowhere to land. โข Overshoot the target โ build a 128 when the level asked for a 64 โ and that value is gone for good. โ THE CAMPAIGN โ Six chapters, and a difficulty curve that is measured rather than claimed: Warm-up ยท Tactics ยท Pressure ยท Precision ยท Deep Water ยท Mastery Every level was found by search, not written by hand, and checked by an automated solver before it shipped. The shortest solution is known exactly, each chapter is pinned to one depth, and levels a thoughtless policy could stumble through are thrown away. If a level is in the app, it has a real answer and no cheap one. โ FREEPLAY โ One tap from the level list: an endless board with no goal and no move limit. Slide, combine matching numbers, and see how far it takes you. Personal bests, a daily board that is identical for every player in the world, and streaks. Game Center leaderboards and achievements if you want them. โ HELP WHEN YOU WANT IT โ โข Hint suggests a strong next move and says why. โข The Coach watches a finished game and names one habit worth fixing โ corners, crowding, or ordering. It never interrupts play, and you can switch it off. โ SEVENTEEN THEMES โ A real 3D board, not a picture of one. Tilt your phone and the light travels across ceramic, glass, walnut, paper, brushed metal and neon. Classic is free; the rest live in optional packs. โ FAIR, AND FINISHED โ No ads. No subscription. No account. No energy meter. Fully offline, on a plane or underground. Undo tokens give you a second chance and one arrives free every day; extra tokens and theme packs are the only things that cost money, and you never need them. Available in 40 languages. โ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
NumFlow
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NumFlow is a relaxing number puzzle game designed to challenge your logic while keeping the experience simple and satisfying. Swap numbers, place them in the correct order, and complete each unique puzzle. Features: โข 1,000 handcrafted-style levels โข Unique shapes and puzzle layouts โข Relaxing animations and sounds โข Helpful hints when you need them โข Light and dark themes โข Multiple language support โข Smooth zoom and navigation for larger puzzles Start simple and progress through increasingly challenging number puzzles. Can you complete the flow?`
Screenshots
Verdict
The clearest difference is ads: Millrace at none against NumFlow's shown. NumFlow's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (16.6 vs 18.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Millrace sells 9 one-off in-app purchases and NumFlow sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Millrace ships an update every 3 weeks, NumFlow every 4 days. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.
| Parameter | Millrace | NumFlow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 4 days โ better |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 16.6 โ better |
| Further details โ not scored | ||
| Size | 294 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Antti Aittamaa | Mustafa Ofluoglu |
In-app purchases
Millrace
- 10 Undos$0.99
- Summer Pack$1.99
- Designer Pack 1$1.99
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- Designer Pack 2$1.99
- Support the Developer$1.99
- Winter Pack$1.99
- 50 Undos$2.99
- 200 Undos$5.99
- Complete Collection$5.99
NumFlow
- 50 Hints$4.99
- Remove Ads$7.99
- 100 Hints$8.99
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- 300 Hints$14.99









