The quick answer: any Jar opened with one of our partner merchants, featured on the Explore screen of the app
The details: HyperJar has partnered with some of the best-known merchants in the UK. When you create a Jar with one of these merchants it's called a Hyper Jar. Advance payments made to these Jars get a reward of 4.8% Annual Growth Rate (AGR) from our partners, calculated and added to your Jar daily to boost your spending power with them.
You can find the list of our partners, and the terms and conditions that apply to their advance payment and reward offers, in the Explore section of the app.
You can spend the advance payments allocated to these Jars and any rewards from the merchants by spending in-store or online with that merchant, in accordance with their offer terms and conditions, using your HyperJar card.