SubLens
SUBLENS / METHODOLOGY

How we compare prices.

SubLens compares the same AI subscription and billing period across verified local offers. Each record keeps its original currency, source and verification date.

Regional coverage

We collect each published Google regional subscription page separately and check its selected country, plan, currency and billing period. Missing or malformed prices do not replace the last successful observation. Regions without a supported reference exchange rate still show their original price and are excluded from currency-converted rankings.

Website and iOS purchase channels

Website offers and Apple App Store listings are collected and shown separately. App Store evidence is bound to the country storefront, official app and developer, currency and exact plan label. Claude Pro and Max subscriptions include Claude Code. ChatGPT store listings lack item-level billing periods and sometimes show multiple prices under one name; all distinct prices remain visible with the period marked unspecified, outside monthly or yearly rankings. A published store listing does not guarantee eligibility or that new subscriptions are available.

What “cheapest” means

The lowest price is the lowest among the verified local quotes in our dataset, using unrounded reference exchange rates. It is not a claim about every country in the world. Taxes are not normalized. Tied markets are marked as joint lowest.

Local offers and reference prices

Only an explicitly regional official offer appears on the price map. Countryless official USD reference prices are shown separately and are never copied into local markets. A blank country means we have no verified local quote, not that the service is unavailable.

Billing, currencies and taxes

Monthly and yearly offers are separate. Annual offers show the actual upfront charge, with a monthly equivalent for context. We never invent annual offers from monthly prices. FX is an estimate, not a card settlement rate. Unknown taxes remain unknown. Trials and introductory promotions are excluded.

Verification and freshness

Each quote keeps its last successful verification date. Failed requests, ambiguous tiers, unexpected currencies and large changes retain the previous quote and appear in the source status. This is a periodically checked reference, not a live checkout. Regional availability lists are reviewed separately and retain their own dates.

Data use terms · v1.0

Effective date:

These terms apply only to rights held by SubLens in its original descriptions and the selection, organization and compilation of its subscription and API pricing data. They do not claim ownership of individual price facts or grant rights in third-party material.

You may browse the data for noncommercial reference and quote small excerpts for noncommercial purposes. Credit SubLens, link to the relevant SubLens page, and retain the official source and verification date shown with the quoted data. Do not misrepresent modified or outdated data as current verified data.

Commercial use is prohibited, including resale, paid reports, or incorporating the covered material into commercial products or services. Attribution does not make commercial use permissible.

Bulk copying, republishing, mirroring or redistribution is not covered by the permission for small excerpts. Even for noncommercial purposes, it requires separate prior written permission from SubLens. This does not create an exception to the prohibition on commercial use.

Third-party prices, source pages, product names, trademarks and other material remain subject to their owners’ rights and terms. These terms do not limit uses permitted by applicable law or rights obtained independently from other rightsholders.

Noncommercial bulk-use permission enquiries: contact@burts.ai

Official price sources

Map data: Natural Earth, public domain