Comparison

World Flags Viewer vs Lumi Math Planet

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

Head to head
About

World Flags Viewer

Display national flags in fullscreen for sporting events or explore them by region. Features include interactive cheer modes with confetti and text overlays, plus offline access to a vast library of high-resolution flags.

Highlights
  • Fullscreen flag display
  • Interactive cheer modes
  • Country and region browsing
  • Favorite flag saving
  • Instant country search
  • High-resolution images
Features
Read full description

"World Flags Viewer" turns your phone screen into a vibrant national flag — perfect for cheering at the Olympics, World Baseball Classic, FIFA World Cup, and any international sporting event! [Cheer Mode] - Tap the screen for colorful confetti bursts - Shake your device for a dramatic flash effect - Add cheer text overlay like "GO!", "FIGHT!", or your own custom message - Auto max brightness & sleep prevention — your flag stays bright throughout the game [Explore the World] - Browse flags from 249 countries and territories - Filter by region: Asia, Europe, Africa, Americas, Oceania - Save your favorite flags for quick access - Search countries instantly by name [Features] - Stunning fullscreen flag display with auto-landscape rotation - Bilingual support (English & Japanese) - High-resolution flag images - Simple, intuitive interface Whether you're in the stands or watching from home, show your support in style!

About

Lumi Math Planet

Features
Read full description

Solve a question and a little planet lights up. Lumi Math Planet turns counting, addition, subtraction, times tables, clocks and money into a gentle space adventure, with 46 question types shown in pictures and read aloud for early readers. Parents can follow progress, practice weak spots and print worksheets with answer keys. No ads, no subscription. A universe your child lights up with their own mind Lumi Math Planet turns math into a warm, cinematic space adventure. Solve a puzzle and a dark little planet flickers to life — buildings rise, auroras bloom, and an adorable space friend floats down to say hello. From Glimmer Planet all the way to the Boss Planet, every right answer makes the universe a little more beautiful. No failure. No buzzer. No shame — only gentle encouragement. So confidence grows on its own. Children ask to play it. That's the part that changes everything. Crafted to a standard you can feel Every planet has its own glowing personality. Every object is sculpted in warm, clay-style art. Every question is read aloud in a gentle, friendly voice. This isn't a worksheet with a cartoon stapled on top — it's a tiny world built with the kind of love you'd want a great teacher to have. Thinking, not just answers — contest-grade Most math apps drill speed. Lumi builds minds. Our question styles are inspired by the world's great early-math challenges — WMI and Math Kangaroo among them: number patterns, logic, spatial reasoning, simple combinatorics, real word-problems. Your child learns to think like a young mathematician, right at the kitchen table. So clear, a child plays before they can read Every single question is visual. Dice, ten-frames, number lines, growing rows, bar charts — abstract math becomes a picture you understand at a glance. No memorizing. No guessing. Just real number sense, discovered. From the very first number to contest-grade thinking Addition & subtraction past 100 (with regrouping), multiplication, division, number bonds, place value, comparing, patterns, odd/even, ordinals, time and money — 40+ question types that level up automatically. Whether it's a pre-reader, a child just starting school, or anyone rebuilding their foundations, everyone begins right at their own level and climbs from there. Growth you can actually see The Parent Zone shows learning across five skill domains, spots weak areas, and opens one-tap focused practice. Export a printable worksheet and a learning report (print it or save a PDF) and carry every milestone with you. Four native languages English · Chinese · Japanese · Korean — questions and voice fully localized, auto-matched to your device. The quiet luxuries No ads. Ever. No data collected — nothing ever leaves the device. No account, no login. Every outbound tap sits behind a parent gate. One promise, kept: a single one-time in-app purchase. No subscription, no nagging. Start without buying with your first planet and the daily challenge; unlock the whole galaxy whenever you're ready. Blast off — and watch your child build a universe that runs on what they just learned. (Question styles are inspired by international early-math contests for practice only; not affiliated with WMI, Math Kangaroo or any organization.) Optimized for iPhone Duo.

Screenshots

World Flags Viewer4 screens
Lumi Math Planet4 screens

Verdict

The call

The clearest difference is in-app purchases: World Flags Viewer at none against Lumi Math Planet's 1. Lumi Math Planet's advantage is ads (none vs shown) and update cadence (every 3 days vs fortnightly). On price, 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. Lumi Math Planet sells 1 one-off in-app purchase. World Flags Viewer asks for nothing beyond the download.

UpkeepUpdate frequency

World Flags Viewer ships an update fortnightly, Lumi Math Planet every 3 days. Both last shipped on October 25, 2026.

Scorecard3 real differences · 6 level
World Flags Viewer versus Lumi Math Planet: the parameters behind the verdict, then further details
ParameterWorld Flags ViewerLumi Math Planet
PriceFreeFree
Rating3.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyFortnightlyEvery 3 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size5 MB56 MB
Age rating4+4+
DeveloperMIZOU, CO., LTD.Guan Feng Lai

In-app purchases

None

World Flags Viewer

No in-app purchases

1 purchases

Lumi Math Planet

One-time1
  • Unlock the Full Galaxy$4.99

Questions

Is World Flags Viewer free?
World Flags Viewer is free to download, with no in-app purchases.
Is Lumi Math Planet free?
Lumi Math Planet is free to download, with in-app purchases available.
Do World Flags Viewer or Lumi Math Planet have ads?
World Flags Viewer shows ads; Lumi Math Planet does not.
Which is updated more often, World Flags Viewer or Lumi Math Planet?
World Flags Viewer ships an update fortnightly, and Lumi Math Planet every 3 days. Most recently, World Flags Viewer was updated on October 25, 2026 and Lumi Math Planet on October 25, 2026.

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