The problem
Your free app is popular, but you have no way to let a user pay ৳50 for the pro export.
With Digimart
Drop in a one-time charge at the exact moment they tap the locked button.
Farming and Weather Advisory
Turning a Popular Free App Into Revenue
A free app with real usage still needs a way to convert some of that usage into revenue, and for many agritech products the natural moment is a single valuable action, like exporting a pro report. Without a lightweight payment option, that ৳50 opportunity is simply lost every time a user taps a locked button.
The purchase moment works like this:
The user taps the locked pro export or advisory feature Digimart triggers a one time charge of ৳50 An OTP confirms the purchase in the moment The feature unlocks immediately, without leaving the app
Why Timing Matters More Than Price Here
The value of ৳50 depends entirely on capturing it at the exact moment the user wants it, not five minutes later after they have moved on. A few outcomes follow from charging in context:
The charge happens at the point of intent, right when the button is tapped No separate payment screen or app switch is needed to complete the purchase Small amounts like ৳50 remain worth collecting instead of being written off Farmers and field users without bank access can still pay directly from their phone
It is worth noting that this fits a single, clearly bounded action, like unlocking one export or one advisory report, rather than an ongoing relationship, which belongs on the Subscription Charging SDK instead.
A free app only becomes a business once the moment of value and the moment of payment happen together.
Where This Fits Into Your Product
The One Time Charging SDK attaches to the locked feature itself, most often a single "Unlock" or "Export" button. Agritech teams and NGOs typically use it for one off actions like this rather than recurring access, keeping the free core of the app intact while monetising specific high value moments.
Related ideas
A monthly content subscription
Charge the subscription straight to their mobile balance. They confirm with an OTP; renewal happens automatically.
Event tickets and bookings
One-time charge in the ৳1-৳600 band covers most ticket prices with no gateway contract.
Unlock a premium feature
A ৳10/month advisory subscription billed to mobile balance reaches people no card network can.