AllIn

The real total, before you pay it

How to use AllIn

A booking page shows you a nightly rate. AllIn shows you what you will actually be charged once everything is added on.
  1. Pick what you're pricing — 🏨 Hotel, 🚗 Car hire or ✈️ Flight. The fees change with each, because the tricks are different.
  2. Describe the trip. Nights, guests, days — whatever Your trip asks for. Everything below is worked out from these, so get them right first.
  3. Start from a typical profile if you want sensible starting numbers, then correct them. It is a head start, not an answer.
  4. ⭐Now the important part — copy the real fees off the booking page in front of you. Resort fee, cleaning fee, young-driver surcharge, the second bag. Everything they add is where you type them. This is the work, and it is the only way the total is true.
  5. Read the total. ▤ Breakdown shows every line. ◔ Per person / per day turns it into the number you can actually judge — a £900 week means more as £64 a night each.
  6. Price the other option too. ＋ Add to comparison saves what's on screen, then change the numbers for the rival booking and add that. ⇄ Compare puts them side by side.
The cheaper headline is often the dearer stay. That is the whole reason this app exists — a $95 room with a $45 resort fee beats a $120 room with nothing added, right up until you pay. Compare totals, never rates.
What it will not do. AllIn has no internet connection, on purpose. It cannot look up today's resort fee and will never pretend to — every number in it is one you typed. It does not check your arithmetic against the real world, it just makes sure nothing gets left out of it. Miss a fee and it will confidently give you the wrong total.
Every number here is yours to change, and none of them are live prices. AllIn has no internet connection by design — it can't quote today's resort fee and won't pretend to. What it does is make sure nothing gets left out of the arithmetic. Copy the figures off the booking page in front of you and you'll see the real total before you commit.

Your trip

These are typical categories, not named companies. A named company's fee schedule goes out of date within months, and a stale number presented as fact is exactly the problem this app exists to solve.

Advertised—
You actually pay—
—

Everything they add

What it works out to

The multiplier is the number worth remembering. It's what the headline price gets multiplied by between the search result and your card.

Side by side

736%
The average amount one budget airline was found to increase the cost of a flight between the headline fare and the true total. The most transparent major carrier still added 95%. Nobody is not doing this — they only differ by how much.

What catches people out

How the trick works

Unbundling isn't an accident, it's the business model. Comparison sites rank on one number — the base price — so whoever shows the smallest base price wins the click. The way to have the smallest base price is to take things out of it: the bag, the seat, the parking, the right to pay by card.

The result is a headline that is technically true and describes a trip nobody takes. Almost nobody flies with no bag in a random middle seat, and nobody books a hotel intending to skip the compulsory resort fee. The gap between that price and yours is where the money is.

Why this one leads with hotels and car hire

Flights got attention: the big search engines now estimate bag and seat costs. Good. Hotels and car hire got none. The resort fee is still invisible until checkout, and the car-hire counter is still the worst offender in travel — the daily rate is often under half the total.

What AllIn is not

Not a booking site. It doesn't search for prices, doesn't take commission, and has no affiliate links. It's arithmetic you can trust because you supplied the inputs.