Your budget, enforced at the swipe.
Every other budgeting app is descriptive — it tells you what you already spent. Rein is enforcing: your budget is the card's spending power, so the plan and reality can never drift apart.
Decline, then recover in one tap.
When an envelope runs dry, the swipe declines — on Rein's own rails, in real time. A push notification offers to cover the gap from another envelope. Approve it and re-tap; it's usually done before the cashier looks up. You decide, up front, which envelopes are even allowed to decline.
Dining is $8.40 short. Cover it from Fun and try again?
Firm where it matters. Flexible where it doesn't.
Not every envelope deserves the same rule. Set each one to the level of discipline it needs — a hard wall around dining, a gentle nudge on groceries, and automatic cover for essentials like gas.
Controls that keep the plan honest.
The envelope is just the start. Rein routes, re-files, and watches spending so your plan stays accurate without babysitting.
Point a merchant at an envelope once and every future charge routes there automatically.
Move a transaction to the right envelope after the fact, or split one purchase across several.
“Rein caught this.” Caps hold the line when a subscription hikes its price or a trial converts.
Every swipe resolves to an envelope by card binding, merchant rule, or category — instantly.
A notification on every transaction, with the envelope and remaining balance right there.
Speed-bump spending is squared away at month-end, so nothing quietly slips the budget.
A budget that can actually say no.
Join early access, or open the prototype to feel the decline-and-recover loop yourself.