You can have multiple lifetime ISAs but can only pay into one each tax year. If you’ve already paid into another lifetime ISA this tax year, then you won't be able to open and pay into a Dodl lifetime ISA until next tax year. That is, unless you're planning on transferring your other lifetime ISA to Dodl.

To transfer to Dodl, download the app, sign up and open your lifetime ISA, then choose the option 'transfer an account'.