Lifestack vs ShopGuru

Lifestack is a productivity planner that builds your daily schedule around sleep, recovery, and focus instead of empty calendar blocks. It reads wearable and health signals, maps energy peaks and calm periods across your day, and drafts a schedule that places demanding work when you can actually focus.

Most calendar apps treat you like a task executor with unlimited stamina. Lifestack treats energy, meals, and rest as first-class inputs, overlaying focus and calm zones on your calendar so you see when deep work fits and when lighter tasks make sense. That body-first layer is the trade-off: it is narrower than a general project manager, but it connects health data to scheduling decisions most planners ignore.

The product suits professionals juggling meetings and deep work, ADHD users who need external structure around energy swings, and anyone syncing tasks from tools like Trello while trying to protect sleep and meal timing. Apps run on iPhone, Mac, Android, and Chrome, with a desktop Mac download and browser extension for calendar access.

ShopGuru is a free shopping assistant delivered as a Chrome browser extension and a web-based research tool. The extension adds a chat button on Amazon product pages so you can ask questions about reviews, specs, and buyer feedback without reading hundreds of comments yourself. The web app lets you describe what you need in plain language, then searches Amazon, Best Buy, Walmart, Target, and other major retailers and ranks options with match scores, value ratings, and written reasoning.

Most review tools either summarize one listing or give generic advice from a general chatbot. ShopGuru limits answers to product-specific data it can verify, and says plainly when it does not know something rather than guessing. That constraint matters on Amazon, where a confident wrong answer about sizing, compatibility, or durability is worse than no answer at all. The web research side goes further by comparing across retailers instead of stopping at a single store's catalog.

It fits online shoppers who want faster due diligence before checkout, deal hunters comparing prices across big-box sites, and anyone tired of tab-hopping between retailer search pages. You do not need an account to try the web research flow, and the Chrome extension is free to install.