Methodology
What we record
Public list prices of digital subscription services, per country, per plan, dated. We record; we do not interpret. The archive does not only record increases; price reductions and unchanged prices are recorded under the same rules.
Verification layers
K1 Public announcement and news records — company statement, blog, or press record of the change. K2 Dated archive — a dated snapshot of the price page. K3 List price — the publicly visible store or price page at the time of recording. K4 Field confirmation — anonymised, aggregated price confirmations from SubLens users. These internal layers are explained here; visitor pages show source types and links in the source breakdown without K codes.
Source tiers
Every record has a source tier. provider: a page of the company that sells the service (price page, help page, announcement or newsroom post). provider_archive: a dated Wayback Machine copy of such a page. press: a news report or any other third-party page; it is marked press report, and its date is shown as reported, never as effective or announced. New records enter only with a provider or provider_archive source. Correction policy: when a provider source contradicts a press figure, the earlier record is not deleted; a correction record with the provider source is added.
Corrections
A record is never edited or deleted to fix a mistake. When a record turns out to be wrong (for example, an official copy shows a different price), a new record corrects it and the old one is marked superseded. Pages and calculations use only the correcting record; the archive CSV keeps both, with a status column (active or superseded), and Feed v2 publishes the correction as its own event that names the record it replaces. Report an error · Corrections ledger
Radar rule
Rumours and expected changes remain outside the canonical price history until reviewed. Confirmed information may become a dated record; refuted information remains in the review trail.
Announced changes
An ANNOUNCED record differs from Radar: it records a dated change that was announced and has not taken effect yet, and it shows its source tier like any other record. Radar carries unverified signals; ANNOUNCED carries a reported change awaiting its effective date.
Dates
The date of a record is the effective date of the price. Where only the announcement date is known, that date is used. Where only the month or year is known, visitor pages show the localized month or year without inventing a day. Where an official archive copy shows a price from the first day we searched, the price may have started earlier: the record says "at least since" that date, not that the price took effect then.
Markets
The unit is the country, not the currency. Currently tracked: United States, Turkey, Germany. Markets without sufficient records are listed as tracking soon.
Scope
Public list prices only. No prices behind login and no personal data.
Corrections
Use the anonymous error report form. Reports are reviewed; corrections are published with the correction date. Report an error · Corrections ledger
About
pricestub is published by EmbedronLabs. It is the price-change record behind SubLens.