What are some alternatives?
When comparing Shopods and Track to Save, you can also consider the following products
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
6paq - We track prices on Amazon, but we don't just track any product.
PriceAlarm.net - Quick price comparison in all Amazon and eBay shops. Price History and Price Tracker inclusive.
Savelist - Found products you want but not ready to buy?
Penny Parrot - Get price drop alerts for products on Amazon as well as historical pricing to find the best deals.