Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.
From our daily snapshots of every grossing chart.
| Sep 24, 2026 | $502.4K a month |
| Sep 25, 2026 | $410.9K a month |
| Sep 26, 2026 | $321K a month |
| Sep 27, 2026 | $491.5K a month |
| Sep 28, 2026 | $332.5K a month |
| Sep 29, 2026 | $377.6K a month |
| Sep 30, 2026 | $368.8K a month |
| Oct 1, 2026 | $383.9K a month |
| Oct 2, 2026 | $419.4K a month |
| Oct 3, 2026 | $390K a month |
| Oct 4, 2026 | $397.4K a month |
| Oct 5, 2026 | $472.3K a month |
| Oct 6, 2026 | $512.9K a month |
| Oct 7, 2026 | $457K a month |
| Oct 8, 2026 | $510.3K a month |
| Oct 9, 2026 | $454.1K a month |
| Oct 10, 2026 | $595.7K a month |
| Oct 11, 2026 | $565.6K a month |
| Oct 12, 2026 | $607.1K a month |
| Oct 13, 2026 | $697.6K a month |
| Oct 14, 2026 | $697K a month |
| Oct 15, 2026 | $91.5K a month |
| Oct 16, 2026 | $111.5K a month |
| Oct 17, 2026 | $107.3K a month |
| Oct 18, 2026 | $102.5K a month |
| Oct 19, 2026 | $110.4K a month |
| Oct 20, 2026 | $105K a month |
| Oct 21, 2026 | $560.3K a month |
| Oct 22, 2026 | not in a grossing chart |
Measured from the store, not estimated.
From the latest 500 reviews on the Japan Google Play, Nov 20, 2022 to Oct 20, 2026: 56% are 1 or 2 stars. Open a theme to read what people wrote.
55 of the 1 and 2 star reviews.
★★★★★ When needed, it doesn't work !
★★★★★ i hope viessmann wil update the software and fix that bug :-/
★★★★★ I have no clue how bad the devs are to release such a horrible app and device that doesn't work.
34 of the 1 and 2 star reviews.
★★★★★ Kein Temperatur Einstellungen nach letzte Update.
★★★★★ since the last update of the app, even though my phone is running the most up-to-date version of Android and should be compatible, I've been unable to use the Vicare app.
★★★★★ update, supplied Viessmann with all details requested and...
30 of the 1 and 2 star reviews.
★★★★★ Can't create an account as the captcha continuously refreshes itself after every attempt.
★★★★★ Worked fine at first but have not been able to log in for the longest time now.
★★★★★ forgotten my password and I have no idea how to log back in.
28 of the 1 and 2 star reviews.
★★★★★ yet app gives me consumption, so clearly wrong
★★★★★ older version becomes useless and won't let open unless the app is immediately updated.
★★★★★ Lot's of useless optiona not supported on my new boioer but I don't see very siple and basic scheduler to turn on/off the heating system automatically at given hours.
19 of the 1 and 2 star reviews.
★★★★★ A way for a direct contact would be great
★★★★★ rubbish, it tells me the that there is a problem and if I search within the system what the problem is but not a word on how to fix it just "contact your dealer" garbage.
★★★★★ App doesn't support switch of language, always takes the device language with no option to configure.
18 of the 1 and 2 star reviews.
★★★★★ 1 star for missing option to change the app language.
★★★★★ App doesn't support switch of language, always takes the device language with no option to configure.
★★★★★ The worst app I've encountered ever, 1 service man for whole country & no way to access your own account, amazing
16 of the 1 and 2 star reviews.
★★★★★ An expensive boiler I can't even use!
★★★★★ saving assistant that costs money is a total scam.
★★★★★ I think it's dreadful that you pay thousands of pounds/euros for a heat pump promised all the clever stuff only to then be told you have to subscribe to read your own data it's criminal, it should be all free so we can…
13 of the 1 and 2 star reviews.
★★★★★ I pressed ok on the boiler and since then app lost internet connection!
★★★★★ software update lost all login info
★★★★★ and I can't connect it to this stupid app because the QR code is gone.
14 of the 4 and 5 star reviews.
★★★★★ So far so good, seems user friendly enough.
★★★★★ Easy to use and practical
★★★★★ Edit: I just thought of this, to the customer that would like this, go into the settings and set daily start & stop periods to save on gas, Long story short it's super user intuitive!
13 of the 4 and 5 star reviews.
★★★★★ Very useful indeed, especially when you live abroad.
★★★★★ I enjoy the app as it is very useful.
★★★★★ Super app with very helpful functions.
11 of the 4 and 5 star reviews.
★★★★★ Works perfectly with 100W.
★★★★★ basic but works well once setup correctly.
★★★★★ The system works well once it's been set up.
6 of the 4 and 5 star reviews.
★★★★★ overall good but does not support language change, that way 4 stars instead of 5
★★★★★ There is no option to resend activation email or contact support.
★★★★★ vicare support team are brilliant.
3 of the 4 and 5 star reviews.
★★★★★ Your team crafted an incredible UI to be very user / customer friendly, there shall be Hot Water at the ready when I see on your app and I turned on my shower and within 10 seconds it was flowing at the desired…
★★★★★ UI is easy to handle and looks modern.
Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.
Latest reviews, Japan Google Play.
I bought a Viesmann boiler and Temperature sensor. I added the boiler, but the sensor is not available to be added (not an option). @Developer...the professional person that came to start the device was not able to do it. A way for a direct contact would be great
I would rate it (minus 10 stars) even one star is a high rating. I am a user of the "BOKA32" device and I do not have an external thermostat.. . And I don't accept the excuse that I have to have an external thermostat.. It's unbelievable that nowadays the application doesn't have time control of turning the device on and off throughout the day.. I have no words..
complicated system, would not have this system again. Heating and hot water work perfectly fine, it's just if you want to put Heating on for a short period of time
Very good.
works well
Kein Temperatur Einstellungen nach letzte Update. Was bedeutet das?? Wie kann man jetzt Temperatur in Zuhause Einstellen? Ich keine "smart Thermostat" oder so.
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Prices, ranks and reviews are per country. Revenue above is already worldwide.