Envelope budgeting
The cash envelope method on iPhone, without linking a bank.
The method works because the money is divided before it is spent. The envelope is a decision you already made, so the choice at the till is simply whether the envelope has anything left.
Why the paper version worked.
Physical envelopes gave each category a hard edge. Groceries had its own envelope, and when it was empty the decision was made for you. There was no running mental arithmetic against one balance and no end-of-month surprise, because the constraint was visible the whole time.
Most budgeting apps lose that. They aggregate everything back into a single balance and then explain, after the fact, where it went.
Why manual entry is a feature here.
Bank-linked apps categorise transactions after they happen. That is a reporting tool, not a budgeting method — the money is already spent by the time the app knows about it. Entering an amount yourself keeps the deliberate step the method depends on, which is the step doing the actual work.
It also means no bank credentials, no account, and no third party holding a connection to your finances.
Running it on an iPhone.
Vaultline: Cash Envelopes is a manual envelope app. You create purpose-specific vaults with targets, record deposits and withdrawals yourself, and the vault names, notes, amounts and history stay on your device. There is no bank connection and no money movement — the app tracks the plan, your bank holds the money.
It is a one-time $3.99 purchase with no subscription.
Clear boundaries
What this is and is not.
Vaultline is a manual tracking tool, not financial advice, not a bank, and not a payment service. It does not move, hold, or access money, and it does not connect to a financial institution. What it records is what you enter. Use your own judgment about how you divide and spend your money.