TIER - Unlock Your City

4.4
83K reviews
10M+
Downloads
Content rating
Rated for 3+
Screenshot image
Screenshot image
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About this app

TIER is now Dott!

TIER and Dott have joined forces to offer you smoother rides, in more locations, and with even better passes.

From now on, all TIER vehicles are ready to ride on the Dott app instead. Download the Dott app today to get riding!
Updated on
Oct 6, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Financial info
This app may collect these data types
Location, Personal info and 6 others
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.4
82.4K reviews
A Google user
May 8, 2019
In addition to my last comment, I have figured out that I was charged because the app could not end the ride properly. The email receipt says that the ride lasted for more than 10 hours and I managed to travel 6km during that time. I would like we have scooters' batarries which would be able to work for 10 hours, however, unfortunately, this was just software bug which costed me more than 100 euros. Dear Tier, what can we do with it?
10 people found this review helpful
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Dott
May 8, 2019
Hi Dmitry, Our customer support team has already answered and refunded you the full amount of this failed trip. We thank you for your feedback. We want to give you the best experience and make your life easier with TIER. We hope you keep on riding with us. Best regards, Your TIER team.
Daffa Z Tamma
April 17, 2024
The app is always buggy when you needed the most. Unable to ride after booking the bike multiple times. When you pressed start, you'll automatically get charged. Regardless if you're able to ride them. When you cancel right away, you'll still get charged, even though you end up didnt ride the bike. Less than two weeks and at least three failed attempts already. Lastly and most frustatingly, there's no refund button for this failed attempt. Just install other competitor apps.
5 people found this review helpful
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Valerie Smidt
September 15, 2024
Having access to scooters is nice when I'm running late, but the minuses of the app limit me using it as often as I'd want to. Ending a ride always takes an extra minute or two, which you get charged for. Sometimes I scan a scooter and it turns out to be broken, despite me only moving a meter and parking it back in the same space, I get charged for the unlock fee, plus 1-2 minues the app spends ending the "ride". Fix your app
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What’s new

TIER is now Dott!

TIER and Dott have joined forces to offer you smoother rides, in more locations, and with even better passes.

From now on, all TIER vehicles are ready to ride on the Dott app instead. Download the Dott app today to get riding!