GrowIt

The extension adds a small widget to product pages on sites such as Amazon, Best Buy, and IKEA. When a user views a price, the widget displays an estimate of how that amount could grow if invested, using a default 8 % annual return and showing values for 20‑ and 30‑year horizons. Small purchases are shown with a monthly‑habit view, while larger items use a lump‑sum projection, and users can switch between these displays.

It operates locally in the browser without requiring an account or collecting personal data, and it runs on Chrome, Firefox, and Edge. The calculations are performed client‑side, and the extension is offered for free with no embedded advertisements. Optional referrals to investment platforms provide the only source of revenue.

The tool is aimed at shoppers who want to compare the immediate cost of an item with its potential long‑term investment value, enabling more informed purchasing decisions without any built‑in purchase recommendations.