Wayfare answers one question: given what you actually set aside each month, when can you afford this trip? It answers with two dates.
On the Trip tab, add each cost as a range — at least this, at most that. If you genuinely know a figure, turn on “I know the exact amount” and enter it once; its range is then zero wide. Also enter what you have saved so far. That number is one you type; Wayfare never connects to a bank.
Each item has a “moves with” setting: on its own, number of nights, number of people, or exchange rate. Items that share a driver rise and fall together, and Wayfare adds them as one thing. This is the single biggest difference between the range Wayfare shows and the range other apps show.
On the Saving tab, add each deposit with its date. After four complete months the Answer tab fills in.
Below four, the spread of your deposits cannot be estimated well enough for the range to mean anything. It was measured: at three months, making the promised range actually hold would require widening it by 1.65× to 4.05×, and a range four times too wide tells you nothing. “I cannot say yet” is the truthful answer, so that is what it says.
Because it is not over. On the 5th of a month, that month’s total is about a sixth of a full one, and counting it would drag your rate down. Only complete calendar months are used.
Because you did skip it. If you saved in January, March and May but not February or April, you are not saving that amount per month. Dropping the empty months would nearly double the rate and would also make the app look far more certain than it is.
No — it is the answer. When your monthly deposits vary more than they add up, the rate cannot be told apart from its own variation, and no honest upper bound exists. Most apps print a month anyway. A few steadier months will produce one here.
Because one date would be a guess wearing a suit. Both the trip’s cost and your saving rate are uncertain, and the date is a ratio of the two, so it inherits both. The most likely month is shown, faintly, between the bounds.
Fetching it would require a network connection, and a network connection is the thing that makes an app’s privacy promise unverifiable. Instead you note the rate when you see it, on the Rate tab. Four notes are enough for Wayfare to measure how much the rate moves; below four it says so rather than pretending a currency is stable.
Your device’s own region setting. There is nothing to choose and nothing to convert — the foreign-currency code you enter is a label, not a conversion.
No. There is no server and no cloud sync. Entries made on one device stay there; your own device backup is the only copy.
The same two dates, the most likely month and the cost range. It computes nothing of its own. Your items, deposits and rate notes never leave the phone.
No. Wayfare reports an interval computed from numbers you typed in and never recommends what to do. It is not affiliated with any bank, broker or lender.
Anything unclear, anything wrong: hello@norea.studio.