Comparison

Cognitive Boost vs Flash Digits

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

Head to head
About

Cognitive Boost

This app offers daily brain workouts designed to enhance cognitive abilities and improve memory. Its intuitive, emoji-based games are suitable for all ages and can be played in short bursts, making it ideal for quick mental exercises.

Highlights
  • Daily brain workouts
  • Improve cognitive abilities
  • Memory training games
  • Emoji-based challenges
  • Suitable for all ages
  • Short game sessions
Read full description

Like your muscles, your brain needs regular workouts to stay in shape. Download this app and use it every day to help you stay sharp. You can improve your brain’s abilities. With regular training the brain is able to form new neural connections. Cognitive Boost can be played by all ages, toddlers through seniors. Because each game is short, it is ideal for playing while waiting for a meeting, or for other events. It is a good "calmer downer" if the person for whom you are waiting is late. Because it is highly intuitive, language skills are not required. Emojis tell you visually if you got a correct or wrong answer. The objects used for the game are based on standard emojis, but their looks have been re-imagined by the students and faculty of a historic European design university. While the game resembles the popular "memory match" games it is unique. It has hundreds of emojis that are displayed randomly. To play, you first memorize two to twenty images at a time, and then pick each original image from a "lineup" that has two new images. Start at two images at a time. As you gain momentum increase the number. Psychologists say that, on the average, without training, a person can get to seven. See how you measure up! Another challenge is increasing the rotation speed of the "multiple choice" answers. The objects rotate in three dimensions, all in different directions requiring observation, timing and memory. You can start the movement at a low speed, and as you get experience move up to a higher level. The app is complete. It is free. There are no in-app purchases. There is a button in the app that allows you to make a voluntary contribution of any amount to Parkinson’s Disease(PD) research. There is currently not a cure for PD, just problematic treatments. The button provides a direct link to the research center’s computer. The app was written as a fundraiser, by a software engineer, with 58 years of experience in IT, who has PD. Take part in the search for a cure! Download the program to get started with your memory training!

About

Flash Digits

Test your visual memory and reaction speed by recalling rapidly flashing numbers. Progress through increasing difficulty levels and compete globally. It's a simple yet challenging game of pure memory.

Highlights
  • Rapid number flashing
  • Progressive difficulty tiers
  • Combo system
  • Global leaderboard
  • Personal best tracking
  • Offline play
Features
Read full description

How fast can your brain capture a number? Flash Digits shows you a 4-digit number for a split second — then hides it. Type what you saw. Get it right, and the next flash gets faster. Get it wrong, and it's game over. It starts easy at 0.9 seconds. But every correct answer shaves 60 milliseconds off your time. Before you know it, numbers are flashing at inhuman speeds — and only the sharpest minds survive. HOW IT WORKS A 4-digit number appears on screen. It vanishes almost instantly. You type the number from memory. Correct answers speed up the next flash. One wrong answer ends the game. 8 DIFFICULTY TIERS - Warm Up — ease into it at 0.9s - Quick — numbers start to move at 0.6s - Fast — blink and you'll miss it at 0.45s - Blazing — real focus required at 0.35s - Insane — only sharp eyes survive at 0.25s - Inhuman — beyond normal reflexes at 0.15s - IMPOSSIBLE — 0.08 seconds. Seriously. - FLY MODE — 0.05s. Can you even see it? FEATURES - Pure memory gameplay — no distractions, no timers, just you vs. the flash - Combo system rewards consecutive correct answers - Global leaderboard — compete for Top 3 worldwide - Personal best tracking to beat your own records - Watch an ad to continue once per game — pick up right where you failed - Clean, minimal design with a friendly brain mascot - Works offline — play anywhere, anytime Flash Digits is the ultimate test of visual memory and reaction speed. Simple to learn, nearly impossible to master. How far can you go?

Screenshots

Cognitive Boost4 screens
Flash Digits4 screens

Verdict

The call

The clearest difference is rating: Cognitive Boost at 4.9 against Flash Digits's 4.0. Cognitive Boost also leads on ratings volume (13 vs 1). On price, update cadence, ads and in-app purchases 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.

ReceptionRating · Positive reviews · Number of ratings

Cognitive Boost holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Cognitive Boost has 13 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Cognitive Boost ships an update every 11 days, Flash Digits weekly. The most recent releases landed on October 4, 2026 and September 23, 2026 respectively.

Scorecard2 real differences · 8 level
Cognitive Boost versus Flash Digits: the parameters behind the verdict, then further details
ParameterCognitive BoostFlash Digits
PriceFreeFree
Rating4.9 (13 ratings) — better4.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings13 — better1
Update frequencyEvery 11 daysWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS16.0 — better16.6
Further details — not scored
Size10 MB68 MB
Age rating4+4+
Developer4Genera LLCROKONTECH LLC

Customer experience

Cognitive Boost

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Flash Digits

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Cognitive Boost

No in-app purchases

None

Flash Digits

No in-app purchases

Questions

Is Cognitive Boost free?
Cognitive Boost is free to download, with no in-app purchases.
Is Flash Digits free?
Flash Digits is free to download, with no in-app purchases.
Which has better reviews, Cognitive Boost or Flash Digits?
Cognitive Boost is rated higher. Cognitive Boost averages 4.9 out of 5 from 13 ratings, while Flash Digits averages 4.0 from 1 ratings.
Do Cognitive Boost or Flash Digits have ads?
Neither Cognitive Boost nor Flash Digits shows ads.
Which is updated more often, Cognitive Boost or Flash Digits?
Cognitive Boost ships an update every 11 days, and Flash Digits weekly. Most recently, Cognitive Boost was updated on October 4, 2026 and Flash Digits on September 23, 2026.

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