Opportunity Cost

Name: Opportunity Cost
Rating: 4.67 (30 reviews)
Author: TFTC

See every price in satoshis. Understand the Bitcoin opportunity cost of your purchases.

As of June 2026, Opportunity Cost has 2,000 users and a 4.67/5 rating from 30 reviews in the Productivity category.

TFTC Productivity

Chrome Web Store ↗.crx

Users0%

2.0K

2,000

Rating−4.5%

4.67

30 reviews

Reviews+7.1%

Version

0.0.6

Manifest V3

History

4 snapshots

Tracking since Apr 19, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 19, 2026	2.0K	4.89	28	0.0.6
May 4, 2026	2.0K	4.89	28	0.0.6
May 13, 2026	2.0K	4.89	28	0.0.6
May 25, 2026	2.0K	4.79	29	0.0.6
Now	2.0K	4.67	30	0.0.6

Permissions & access

Permissions: tabs
Host access: None declared

Screenshots

About

Think in sound money, everywhere you browse.
Opportunity Cost instantly shows the price of products and services in bitcoin ( ₿ / sats ) next to the original fiat amount. No more mental math or tab-hopping to converters—just a constant reminder of what spending really costs in Bitcoin terms.

Key features

Automatic price detection & conversion – Detects 10+ local currencies and shows the live satoshi equivalent right on the page.

Real-time rates – Pulls spot prices from reliable Bitcoin exchanges every ~30 seconds for up-to-date conversions.

Inline or tooltip display – Choose a subtle gray sats value beside the price, or a tooltip that appears on hover.

Dark mode support – Looks great in light or dark themes, automatically matching your browser’s appearance.

Quick toggle – Click the toolbar icon to pause/enable on the current site or everywhere.

Customisable – Pick your preferred currency, number format (sats / BTC), display precision and refresh interval.

Zero sign-up, zero tracking – We collect no personal data. All parsing and settings storage happens locally (via IndexedDB); the only outbound request is for a BTC/FIAT price feed.

Open-source – View the code, file issues or contribute on GitHub.

Permissions note
This extension uses the tabs permission solely to support per-site toggling, allowing you to enable or disable Bitcoin pricing on specific websites.