Summary of accounting policies - Property and equipment (Details)	12 Months Ended
	Dec. 31, 2025
Bikes and ebikes and related batteries \| Minimum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	2 years
Bikes and ebikes and related batteries \| Maximum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	4 years
Computers and equipment \| Minimum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	2 years
Computers and equipment \| Maximum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	5 years
Vehicles \| Minimum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	3 years
Vehicles \| Maximum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	5 years
Others \| Minimum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	5 years
Others \| Maximum
Disclosure of detailed information about property, plant and equipment [line items]
Estimated useful lives	40 years