Meter readings that take ten minutes, not an evening.

What it does

• The previous reading always comes from your own history, never from whatever is typed in the box.
• A reading lower than the last one is refused, because a meter does not run backwards.
• The first reading on a meter is a baseline and bills nothing.
• The rate is frozen onto the reading when it is billed, so raising your rate next year never rewrites last year's bill.

What it does not do

• DeraOS does not read meters for you and has no connection to any utility.

Works with

• Charges beyond rentWater, internet, the lift, the guard.
• Rent managementKnow exactly who has paid, and who has not.
• Payments and receiptsRecord what arrived. Give them proof.