The math comes before the monetization.

Calculation standards

We show the material inputs used in each result, keep assumptions editable and explain the formula. We distinguish estimates from verified facts and add source dates where information can change.

Product selection

Products are matched using relevant specifications such as compatibility, output, capacity, efficiency, pack size and estimated project cost. Retailer availability and pricing can change between checks.

Corrections and updates

We monitor product links and maintain review dates. When a material error is confirmed, we correct the calculation or content rather than quietly changing the conclusion to favor a commercial partner.

Commercial independence

Affiliate relationships may influence which retailers we can link to, but they do not purchase favorable calculations, rankings or reviews.