The rate is amongst the leaders but you can only make three withdrawals a year. If you make more, then your rate drops to 0.5% on the tax-free cash Isa and 0.25% before tax on the easy-access ordinary savings account.
The top easy-access accounts online are Leeds Building Society's Limited Issue Online Saver, Tesco Bank Internet Saver and French-owned RCI Bank all at 1%. The Tesco rate is boosted by a bonus paid for the first year, after which your rate tumbles to 0.4%.
On easy-access cash Isas the top rate comes from Coventry Building Society at 1.1% followed by National Savings & Investments Direct Isa at 1%. But you can't transfer your existing cash Isas into these accounts.
Other top deals
The top deals for transfers is the new Virgin Money Defined Access Isa, available online, through its branches or by post, at 0.95%.
With Atom you have to run your account on your phone through its app while with French-owned RCI Bank your money is covered by the European compensation scheme rather than the UK Financial Services Compensation Scheme. The European scheme gives you €100,000 (around £84,000) worth of cover.
This story was originally written for our sister magazine, Money Observer.