Comparison

drillio vs Sumflash

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

Head to head
About

drillio

Enhance your calculation abilities with engaging mental math exercises. This app offers customizable practice cards for addition, subtraction, multiplication, and division, along with progress tracking to keep you motivated.

Highlights
  • Mental math cards for calculation techniques
  • Customizable practice modes
  • Progress tracking via stats tab
  • Engaging brain-boosting exercises
  • Covers addition, subtraction, multiplication, division
Features
Read full description

Welcome to drillio-Mental Math Training, the ultimate app designed to boost your mental math skills and brain power. With drillio, you can master calculation techniques through mental math cards crafted to engage and challenge your mind. Our app is perfect for those looking to improve their mental arithmetic skills and unleash their full cognitive potential. Whether you call it brain math or mental calculation, our mental math cards will keep your mind sharp and agile. We believe in making mental math accessible and enjoyable for everyone. In drillio, the lessons are divided into small, manageable units designed to be both fun and easy to follow. Even if numbers aren't your strong suit, you'll find our method painless and rewarding, as you sharpen those brain math skills. Our custom cards allow for tailored practice, ensuring you can focus on areas like addition, subtraction, multiplication, and division. To achieve mastery, practice and continuity are key. Our app not only helps you with mental math exercises but also offers a 'stats' tab. This feature lets you visualize your progress and stay motivated on your mental calculation journey. Whether you want to enhance your arithmetic abilities for everyday tasks or brain training purposes, drillio has got you covered. Key Features: - Comprehensive training with mental math cards covering addition, subtraction, multiplication, division, and more. - Customizable modes to focus on specific math skills you want to improve. - Engaging activities that transform math games into brain boosting exercises. - A dedicated 'stats' tab for tracking your progress and staying motivated. - Fun and interactive interface that encourages continuous learning. Don't wait! Dive into the world of mental calculations and math skills enhancement with drillio. Whether it's mastering subtraction or honing your overall arithmetic prowess, our app is designed to help you become a mental math expert. Start your journey today and see how much you can improve. Become more competent in mental math with drillio's brain-enhancing cards.

About

Sumflash

Features
Read full description

Numbers appear on screen one at a time, each for just a moment. Add them all up in your head and enter the total. This is flash mental math, the way it's practiced with the soroban (Japanese abacus). There are 30 levels, and you practice at the one you choose. - See why you missed After each answer, review every number that flashed along with the running total at that point. Numbers where a carry happened are highlighted, so you can spot exactly where you slipped. Replay the same problem, or replay it slowly. - From 0.2 to 5.0 seconds Set the speed yourself anywhere from 0.2 to 5.0 seconds per number. - 30 levels From 1 digit, 3 numbers, 1 second each, each level changes one thing at a time: more numbers, then faster, then more digits (up to 3 digits, 15 numbers, 0.5 seconds). Change your level anytime from the home screen. Already experienced? Pick a higher starting point on the first launch. - A daily habit Your home screen shows your streak: how many days in a row you've practiced. Miss just one day in a Monday-to-Sunday week and your streak stays alive. One set is five problems and takes just a few minutes. Set a daily reminder at a time you choose (it stays quiet on days you've already practiced). - Five themes • Minimal: thin numbers on white • Washi: Mincho numerals and a red seal • Neon: glowing numbers • Chalkboard: chalk numbers on green • Sakura: rounded numbers on pale pink Your records carry over when you change themes. - For the whole family Each profile keeps its own level, practice days, and records. - Ranked play and leaderboards One digit, ten numbers, a little faster each stage. Your fastest cleared display time goes to Game Center leaderboards (today, this week, all time; global and friends). - Add, subtract, multiply, divide Pick one from the tabs on the home screen. Addition and subtraction (mixed plus and minus) flash numbers one at a time; multiplication and division flash a single expression like "23 × 7". Each has its own 30 levels to choose from. - Read aloud Have numbers read aloud as they flash. - Also • An optional tick sound with each number (plays even in Silent mode; you can turn it off in Settings) • Numbers simply appear and disappear, with no animation getting in the way • Records are stored only on your device (if you're signed in to Game Center, only your best ranked-play time is sent to Apple for the leaderboard) • No sign-in - Premium (auto-renewable subscription) • No ads Monthly subscription. The price is shown in the app and may vary by region. It renews automatically every month and is charged to your Apple ID unless you cancel at least 24 hours before the renewal date. Cancel anytime in iPhone Settings › Apple ID › Subscriptions. Premium only removes ads. Every other feature is free. - About ads Ads appear at the bottom of the home screen and between sets. No ads while numbers are flashing, while you're entering your answer, or while you're reviewing. Premium has no ads. Terms of Use: https://fukuidinotech.github.io/sumflash-lp/en/terms.html Privacy Policy: https://fukuidinotech.github.io/sumflash-lp/en/privacy.html Contact: fukuidinotech@gmail.com

Screenshots

drillio4 screens
Sumflash4 screens

Verdict

The call

The clearest difference is update cadence: Sumflash at every 3 days against drillio's fortnightly. On price, ads, 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. drillio sells 3 in-app purchases, starting at $1.99 per month and Sumflash sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

drillio ships an update fortnightly, Sumflash every 3 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 9 level
drillio versus Sumflash: the parameters behind the verdict, then further details
ParameterdrillioSumflash
PriceFreeFree
Rating4.5 (8 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings8 — better—
Update frequencyFortnightlyEvery 3 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size33 MB14 MB
Age rating4+4+
DeveloperRyo IidaToru Fukui

In-app purchases

3 purchases

drillio

Subscriptions3
  • drillio PRO Monthly$1.991 Month
  • drillio PRO campaign1 Year trial$14.991 Year
  • drillio PRO Annual$14.991 Year
1 purchases

Sumflash

Subscriptions1
  • Premium (Monthly)$1.991 Month

Questions

Is drillio free?
drillio is free to download, with in-app purchases available.
Is Sumflash free?
Sumflash is free to download, with in-app purchases available.
Do drillio or Sumflash have ads?
Both drillio and Sumflash show ads.
Which is updated more often, drillio or Sumflash?
drillio ships an update fortnightly, and Sumflash every 3 days. Most recently, drillio was updated on October 13, 2026 and Sumflash on October 6, 2026.

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