This needs to be clearly displayed, but not too large that it detracts from the main content of your screen.
The pricing needs to be prominent, written in UK sterling and the full cost of the service needs to be given. If the service is a subscription, it needs to be clear to the consumer how often they will be paying and how much. Don't be misleading!
Make sure that the 2-factor authentication process is clearly explained.
Non-premium contact method
This needs to be included. It should be obvious but not distracting.
You need full, consistent and prominent detail of service terms in a large, clear font.
Keep it simple
Don't overwhelm consumers with too much text and make sure that you use a colour scheme that is appropriate to your brand.
Explanation of charges
This needs to be transparent and clear, that explains the cost will be charged to the mobile phone bill.
Use concise, punchy wording.
And Don't Forget...
- If the service is a competition, is there a question of skill or a free entry route?
- If marketing messages are likely to be sent, is this explained? The nature of the messages should be disclosed and there should be an option to opt out of this service.
- Do you need age controls? These should be clearly displayed. It's also best to avoid using formatting or colours that will entice children if the content is not applicable to them.
- Have you considered what to provide customers with after purchases? You should provide payment verification screens, receipts, subscription notifications and spend reminders.