To switch profit trackers without losing history, export or write down every cost with the date it took effect before cancelling, connect the new tool and let it backfill your orders from Shopify, re-enter the costs with their dates, and run both tools for a few weeks, reconciling one finished day line by line.
Switching profit trackers is easier than switching almost anything else in a store, because the orders live in Shopify rather than in the tool: any tracker worth using rebuilds the sales side from your own store history in its first sync. What does not come across is the work you did, which is the cost data, and that is the whole of the migration. This is the order to do it in, what you should write down before cancelling anything, and the two things that genuinely will not transfer.
nouz is one of the tools compared here; competitor prices were read on 1 Oct 2026.
In short
- The sales history rebuilds itself from Shopify, so you are not losing orders by switching.
- Your cost rules are the asset. Write them down, with the date each took effect, before you cancel anything, in whatever form the old tool allows.
- Run both tools in parallel for a few weeks and compare a single day end to end.
- Two things do not transfer: whatever the old tool computed for months you no longer have costs for, and any attribution model.
Write it down first, cancel later
The single mistake worth avoiding is cancelling before recording your costs. Take out unit costs per variant, shipping rates, payment fee rules, your fixed cost list and any manual ad spend, in whatever format is available, even if it is a screen you have to copy by hand.
Dates matter more than the figures. If the old tool holds any history of when a cost changed, that is the most valuable thing to record, because it is the part that takes months to reconstruct and cannot be recovered from a supplier's memory. In TrueProfit, checked 1 Oct 2026, that history sits on the orders themselves rather than on the cost page: its April 2026 cost page shows the latest cost per product, and since its changelog v9.37 (26 May 2026) a changed product cost applies to new orders only, so each past order keeps the cost it was priced at until you recalculate it. Your own records of supplier price changes are therefore the source to keep. A price list with effective dates is the shape to hold them in, and it is the shape nouz works in: each unit cost per variant is entered with the day it took effect, so the dates you write down become history in the statement rather than a single current price.
What the first sync gives you for free
Orders, refunds, products, variants and payment transactions, back to the store's first sale, which means every revenue line is correct on day one. nouz backfills the entire order history on every plan, so a store with six years of sales gets six years of revenue lines rather than a trailing window. What is missing on day one is everything below revenue, because the new tool has no costs yet and will say so rather than guessing.
That is the right order to work in anyway. Get the revenue lines agreeing with your own expectations first, then add costs from the top down: goods, then fulfilment, then fees, then the fixed block, each one making one more margin real.
| Feature | Comes from | Effort |
|---|---|---|
| Orders and refunds | Shopify, on first sync | none |
| Products and variants | Shopify, on first sync | none |
| Unit costs and their dates | Shopify's cost per item where it is set; the rest from your records, per variant | an afternoon |
| Shipping and fee rules | your records | an hour |
| Fixed costs | your own records | an hour |
| Historical ad spend | platform connectors, or a CSV for other channels | minutes |
Run both for a few weeks
Parallel running is cheap insurance and it is the only way to find the differences that matter. Pick one finished day, reconcile it end to end in both tools, and write down every discrepancy with its cause: a different VAT treatment, a refund booked to a different day, a shipping cost computed per order rather than per parcel.
Every difference you find is either a bug or a definition, and both are worth knowing before you rely on the new numbers. If two tools disagree by exactly your tax rate, you have learned something about at least one of them.
The two things that do not transfer
First, computed history for periods you cannot cost. If the old tool held costs you did not record, its margin history for those months cannot be reproduced anywhere, which is the strongest argument for writing your costs down properly rather than quickly.
Second, attribution. If your old tool modelled which channel produced which order, that model stays with it. nouz measures marketing blended: MER, POAS with the break-even MER it implies, and blended CAC, from spend on the billing side and revenue on the store side, with no pixel involved. Blended figures answer whether advertising pays overall, and they answer it from money actually spent; which ad did it is a different question, and one a migration should not promise to carry across.
The weeks, in order
- Day one: write down everything from the old tool, especially any dated cost history, before touching a subscription.
- Day one: connect the store to the new tool and let the full backfill run.
- Day two: check the unit costs nouz prefilled from Shopify's cost per item, enter or edit the rest per variant on the Products page with the date each took effect, then shipping, then fees, then the fixed block, checking a margin after each.
- Day three: connect the ad accounts, and import older spend with an ad spend import template where the connector cannot reach back.
- Weeks two to four: run both tools, reconcile one day fully, then cancel the old subscription once nothing surprises you.
What to expect afterwards
Numbers that differ slightly from the old ones, and the difference should be explainable rather than mysterious. Where the new tool prices costs with effective dates, a change closes the previous rule the day before and opens a new one, and a backdated change re-prices only from the date you give it. What nouz costs is Base $55, Pro $115 and Scale $289 a month (about €49, €99 and €249), with every feature on every plan, set out in full under nouz's pricing. The reasons a store leaves TrueProfit specifically are covered in TrueProfit alternatives, and nouz vs TrueProfit compares the two directly, prices dated there too.