How we measure

Every number on Tosheroon comes from prices we recorded ourselves. This page defines each one, so you can check our claims against our method.

Prices

We record Amazon prices around the clock and store one aggregate per product per calendar day: the lowest and highest price seen that day, and whether the product was in stock. Prices are stored exactly as observed — never estimated, never interpolated.

Reference prices

A "was" price on Tosheroon is a price the product actually held in our records — the product's recent price level, not a manufacturer's list price and not a one-day marketplace spike. Where our records are too thin to establish a reference, we show no reference at all.

Drops, and "drops caught this week"

A drop is a product whose current price sits below its reference price. The homepage counter is the number of products with a drop recorded in the last seven days for your region — recomputed continuously, cached for at most 45 minutes.

Pattern confidence

Many products return to a recurring low on a rhythm. When we show a pattern, the confidence label reflects how regular that rhythm has been in the product's own history: High means at least four returns at consistent intervals over the past year; Medium means fewer returns or a looser rhythm. Forecasts are estimates from each product's history — a likelihood, not a promise.

The demo on our homepage

The "Today's watch" chart is real recorded data for a real product, chosen daily from a shortlist of products with clean, verifiable histories. The "your price" line on it is an illustration of how alerts work — it is labelled as an example.

Independence

Tosheroon is free. We may earn a commission when you buy through our links — it never affects the prices we record, the drops we report, or the order we show them in.

Corrections

If we get a number wrong, we correct the record and say so. Spotted one? Email hello@tosheroon.com.