Comparison

MM Go vs Otus Game

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

Head to head
About

MM Go

Practice calculation skills with this math game designed for all ages. Compete against others, unlock levels, and earn rewards. It encourages brain exercise and offers a unique way to engage with mental math.

Highlights
  • Mental math practice
  • Unlockable levels
  • Multiplayer battles
  • User profiles
  • Avatar customization
  • Age group selection
Features
Read full description

Want to check your mental math calculating skills through a math test? "MM Go" means "Mental Math on the go." This is one among the maths fun games, designed to encourage EVERY ONE of all ages to practice calculation skills while having fun by unlocking levels or battling with others in numeracy. Nowadays, people are getting more and more dependent on electronic devices to do maths drills, and give less opportunity for the brains to do the work & get math practice and explore learning. This math app wants to remind people: you never know how powerful your brain is! And so this app provides a unique way to do mental math practice. It’s a unique among other mathematics games. Selected schools are the first level venues for people to practice, meet, and battle in this mathematics games. Those who collect enough rewards are qualified to battle at the state, national, and eventually the world levels. The final world champion of each operation (addition, subtraction, multiplication, and division) of each age group will each win US$1000 from the MM Go Company. Features: · User profile to set up the account in this mental maths calculation game. · Option to change your Avatar i.e. profile picture · Sound option in this maths fun brain game. · Many interesting options in this mental math game. · Option to select the age group of player in this maths practice game. Every correct answer will be recorded as points of millage for each player. Players can use accumulated millage to travel to a place that is outside of the default radius range and play. This gives players the opportunities to meet other players in distance, setup high records, and collect more rewards. MM Go is the very first attempt of Mental Math game for players to virtually interact in various scales. Get your everyday maths drills in this app. Updates and improvement are the continuous efforts by this math app. Your comments and feedback are welcome for this mental math calculation game. Download this unique educational game. It’s a very unique one among other mathematics games.

About

Otus Game

Engage in a variety of games designed to improve eye health and vision. Requires membership and eye score measurement through a companion app to begin playing.

Highlights
  • Eye exercise games
  • Vision improvement focus
  • Requires Otus Plus membership
  • Eye score measurement integration
  • Suitable for tired eyes
Features
Read full description

Otus Game is a collection of eye exercise games provided by Otus. How to play: 1. First, sign up for membership on the Otus Plus app and then perform eye score measurement. 2. Log in to Otus Game with the same account you signed up with on Otus Plus app. 3. Select a member and proceed with the games. Recommended for people: - Whose eyes are tired from using cell phones - Whose vision becomes increasingly blurry when looking at close objects - Whose vision becomes increasingly blurry when looking far away - Who have difficulty focusing “Sound effects obtained from https://www.zapsplat.com“

Screenshots

MM Go4 screens
Otus Game3 screens

Verdict

The call

The clearest difference is in-app purchases: Otus Game at none against MM Go's 3. Otus Game also leads on review sentiment (67% vs 33%) and update cadence (every 2 weeks vs every 2 months). On price, ads 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. MM Go sells 3 one-off in-app purchases. Otus Game asks for nothing beyond the download.

UpkeepUpdate frequency

MM Go ships an update every 2 months, Otus Game every 2 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
MM Go versus Otus Game: the parameters behind the verdict, then further details
ParameterMM GoOtus Game
PriceFreeFree
Rating3.9 (22 ratings) — better—
Positive reviews33.3% of reviews66.7% of reviews — better
Number of ratings22 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size119 MB174 MB
Age rating4+4+
DeveloperRuey-In ChiouEDENLUX Corp.

Customer experience

MM Go

All ratings22 ratings
Positive72.7%
Neutral4.5%
Negative22.7%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

Otus Game

Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

3 purchases

MM Go

One-time3
  • 1 Month of Prime Membership$1.99
  • 1.99 per Month$1.99
  • 19.99 per year$19.99
None

Otus Game

No in-app purchases

Questions

Is MM Go free?
MM Go is free to download, with in-app purchases available.
Is Otus Game free?
Otus Game is free to download, with no in-app purchases.
Do MM Go or Otus Game have ads?
Neither MM Go nor Otus Game shows ads.
Which is updated more often, MM Go or Otus Game?
MM Go ships an update every 2 months, and Otus Game every 2 weeks. Most recently, MM Go was updated on November 2, 2026 and Otus Game on November 4, 2026.

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