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.
Mental Arithmetic Helper
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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.
MIRAIRO Door
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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 doorβs 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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Mental Arithmetic Helper | MIRAIRO Door |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly β better | Every 4 weeks |
| Ads | Yes | No β better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.8.3 | 15.0 β better |
| Further details β not scored | ||
| Size | 37 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideaki Uchikoshi | Haudi, Inc. |
In-app purchases
Mental Arithmetic Helper
No in-app purchases
MIRAIRO Door
No in-app purchases
Questions
Is Mental Arithmetic Helper free?
Is MIRAIRO Door free?
Do Mental Arithmetic Helper or MIRAIRO Door have ads?
Which is updated more often, Mental Arithmetic Helper or MIRAIRO Door?
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