Comparison

Mental Arithmetic Helper vs MIRAIRO Door

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

Head to head
About

Mental Arithmetic Helper

Features
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Calculator that can ask questions with random calculation formulas for mental arithmetic practice etc. >Mental arithmetic practice mode When you tap the mental arithmetic practice mode button, questions will be automatically asked at random. *Tap the mental arithmetic practice mode button again to return to a normal calculator.

About

MIRAIRO Door

Features
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The MIRAIRO Door App, jointly developed by Fulltech INC. and Haudi, Inc., allows users of automatic doors equipped with the "MIRAIRO Door" functionality to adjust door operations based on their specific needs. For example, you can extend the door's open duration or slow down the closing speed. By pre-selecting your applicable situation within the app's settings, the movements of compatible automatic doors will adapt accordingly. [Main Features] You can temporarily adjust the operational settings of compatible automatic doors by notifying them of your preferences. Select your situation to configure the desired operational changes all at once. If compatible (*), the following settings can be adjusted: - Increase door opening speed. - Slow down door closing speed. - Extend the door's open time. - Open the door wider. - Open the door without relying on motion sensors or door-open buttons when approaching. - Open the door using a button within the app. - Provide audio guidance about the door’s status during opening and closing. - Display guidance on signage. - Play door guidance sounds from a certain distance. - Send assistance requests to administrators. *Note: Compatibility for these features depends on the building, installation environment, and management conditions. Some doors may not support all features. Note: Doors already set to "slow closing" may not show further changes. Adjustments are limited to the capabilities of the door's hardware. [Compatible Products] Automatic doors equipped with the FT Assist Door functionality. [Recommended Environment] The latest iOS and an iPhone compatible with the latest iOS. Note: Not compatible with tablet devices. Note: Operation is not guaranteed on all devices. [Additional Information] An internet connection is required to use this app. Internet communication occurs when downloading the app, registering keys, or using remote unlocking features. To use this app, you must enable Bluetooth on your smartphone and grant access to precise location information for the "MIRAIRO Door App." Depending on your smartphone's settings, communication environment, and surrounding signal conditions, some features may not be available. The app's features and interface design are subject to change without notice.

Screenshots

Mental Arithmetic Helper1 screens
MIRAIRO Door3 screens

Verdict

The call

The clearest difference is ads: MIRAIRO Door at none against Mental Arithmetic Helper's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Mental Arithmetic Helper ships an update fortnightly, MIRAIRO Door every 4 weeks. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

Scorecard1 real difference Β· 5 level
Mental Arithmetic Helper versus MIRAIRO Door: the parameters behind the verdict, then further details
ParameterMental Arithmetic HelperMIRAIRO Door
PriceFreeFree
Update frequencyFortnightly β€” betterEvery 4 weeks
AdsYesNo β€” better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.8.315.0 β€” better
Further details β€” not scored
Size37 MB2 MB
Age rating4+4+
DeveloperHideaki UchikoshiHaudi, Inc.

In-app purchases

None

Mental Arithmetic Helper

No in-app purchases

None

MIRAIRO Door

No in-app purchases

Questions

Is Mental Arithmetic Helper free?
Mental Arithmetic Helper is free to download, with no in-app purchases.
Is MIRAIRO Door free?
MIRAIRO Door is free to download, with no in-app purchases.
Do Mental Arithmetic Helper or MIRAIRO Door have ads?
Mental Arithmetic Helper shows ads; MIRAIRO Door does not.
Which is updated more often, Mental Arithmetic Helper or MIRAIRO Door?
Mental Arithmetic Helper ships an update fortnightly, and MIRAIRO Door every 4 weeks. Most recently, Mental Arithmetic Helper was updated on October 30, 2026 and MIRAIRO Door on November 4, 2026.

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