Only annual billing is accepted at the moment.
For information regarding KooBits Maths learning plans and pricing, please refer to koobits.com/plans. If you would like to try our Maths Premium Plan first before deciding to purchase, you can sign up for a free 7-day Maths trial.
For information regarding KooBits Science, you can refer to www.koobits.com/sg/science. If you are interested in KooBits Science, you can sign up for a free 7-day Science trial.