Boopa - BOOTH Price Tracker for VRChat

View price history charts for VRChat-related products on BOOTH. Use past prices and recorded lows to help you shop. “How much did that avatar cost before?” Find out with Boopa. Boopa - BOOTH Price Tracker for VRChat is a browser extension that displays price history directly on BOOTH product pages for VRChat avatars, outfits, tools, and more. ⭐ Key Features ・Price history charts View recorded price changes directly on product pages. Supports both standard BOOTH product pages and product pages on shop subdomains. ・Compare product options View price history for each option, such as Quest editions or outfit versions for different avatars. Hover over a legend entry to highlight its line, or click it to show or hide it. ・Choose a date range Select 1 day, 5 days, 1 month, 6 months, year to date, 1 year, 5 years, or all time. Only the available recorded data can be displayed. ・Recorded lowest prices Enable the checkbox to display each option’s lowest recorded price and the date it was recorded. This feature is off by default, and your preference is saved. An “At recorded low” badge appears when the latest recorded price matches the recorded low. When sufficient data is available, a percentage comparison against a past price recorded on multiple dates is also shown. This is not the shop’s advertised discount for a current sale. ・Readable charts even with extreme prices Extremely high prices that meet the detection criteria are separated from the normal display range. Use the ▲／● button to switch between a zoomed-in view of the usual range and the full price range. The original price history is retained. Open the outlier count to see product names, dates, and prices in a table. ・Five supported languages Supports Japanese, English, Korean, Simplified Chinese, and Traditional Chinese. The interface within product pages follows BOOTH’s display language. 🔒 Data and Settings No BOOTH login is required. The extension does not read BOOTH account information or cookies, or store your browsing history. It retrieves public price data from GitHub Pages using the product ID. Display preferences are saved locally in your browser. 🔎 Supported Products Designed for VRChat-related avatars, outfits, tools, and similar products. Eligibility is determined using product categories, tags, titles, and related information. Price history is not available for every product. ⚠ Important Notes ・Dates attached to collected price records use Japan Standard Time (JST / UTC+9). ・Collection is scheduled to start daily at 00:00, 06:00, 12:00, and 18:00 JST. GitHub Actions congestion and data retrieval conditions may delay starts or updates. ・Each product is not guaranteed to be updated four times a day. Brief sales or price changes may not be recorded. ・Eligible products without data may show sample data labeled “Awaiting data: demo.” Demo data is not actual price history. ・Before purchasing, check the latest selling price on the BOOTH product page. Release History Ver.1.2.0 — 2026/10/11 ・Added Japanese, English, Korean, Simplified Chinese, and Traditional Chinese support. ・Improved charts containing extreme recorded prices. Added normal-range/full-range switching and an outlier price history list. ・Adjusted the interface to suit the widths and designs of standard product pages and shop pages. ・Revised the percentage comparison shown alongside recorded lowest prices. Ver.1.1.0 — 2026/05/30 ・Added recorded lowest prices, record dates, and percentage comparisons for individual product options. ・Improved charts to show markers primarily where prices change. ・Automatically merges records split by product name changes during sales. Ver.1.0.4 — 2026/02/11 ・Major UI improvements. Ver.1.0.3 — 2026/02/10 ・Fixed filtering. Ver.1.0.2 — 2026/01/21 ・Fixed demo display, categories, and date range labels.