HeatAlgo has three fixed elements: the Start page, the side menu on the left and the top bar. Everything else - projects, modules, Algo, settings, billing - opens from them. This article describes what is where, so you do not have to search. What changed in the app in October: the October 2026 update.
The Start page
Start opens after signing in and from the "Start" item in the side menu. On it you find:
- a greeting with the number of active projects and the "New project" button,
- the field "Tell Algo what to do in your project..." - a question for Algo, with ready suggestions ("Find what is missing in a project", "Create a new project", "What can you do in heatalgo?"),
- the "Setup" card on a new account, with its steps in this order: "Who you are", "First project", "First report", "Use Algo AI", "Secure your account" (two-step verification) and the optional "Complete your profile" - each with a link to the right place; finish all five steps for a discount on a report or a subscription (details in what is free and what a report unlocks),
- "Recently edited" and "Other projects" with the "Continue" (opens the module you last worked in), "Open" and "Start" buttons,
- the "Your brand" card with the logo and company name, and "What's new" - announcements about changes in the app,
- the "Guides" section with links to the help center.
On a brand-new account, Start shows the four modules with a short description - you start with any of them, and the app remembers your progress.
The side menu
The side menu (hidden behind the menu button on a narrow screen) has the items: "Start", "Algo AI", "My library" (the constructions, windows, doors, units, fittings and radiators saved on your account, there to pick in every project), the notification bell, and the "Projects" section with a plus for creating and the project list. Every project on the list expands to "Project overview" and the four modules: "Heat loss calculation", "Heat pump selection", "Underfloor heating", "Heat recovery ventilation" (with a beta badge). The "All projects" item leads to the full list. You collapse the menu with "Hide menu" and expand it with "Show menu".
At the bottom of the menu is the account card with the plan name ("Free account", the number of credits, or "Subscription active") - clicking the card opens the account menu - and the "Full access" box with the "Unlock" button, which you can hide for 30 days.
The top bar
The top bar holds the breadcrumb (project, module, step), the "Back" button, the "?" icon with help for the current screen (only where such help exists), the "Algo AI" button and, on a narrow screen, the notification bell.
The account menu (the account card at the bottom of the side menu) contains: "Settings", "Plan and billing", "Help center", "What's new" (the changelog), "Send feedback", "Email us", "Language", a "Learn more" submenu with "Terms of service" and "Privacy policy", and "Sign out". Module help is not a menu item - it is the "?" icon in the top bar.
A module's buttons are on the wizard's bottom bar: module settings (the gear on the glass island, in the heat loss calculation from step 2 and in pump sizing: "Data sources" with "Algo AI", and "Module data" with "Clear") and, on the Result step, the square report notes and PDF download buttons. In underfloor heating the export actions are on the toolbar.
The project dialog: Ctrl+K
Ctrl+K (Cmd+K on a Mac) opens the "Projects" dialog from anywhere: a list of recent ones, a "Search projects" field, and next to every item whether the project is unlocked. The arrow keys select, Enter opens, Esc closes. A name with no match offers "Create project "name"". Details in the article on projects.
The module wizards
The heat loss calculation, pump sizing and ventilation are wizards: below the form is a bar with a square "Back" button, a glass island and a "Next" button. On the island the step number (e.g. "4/7") opens the list of steps, in which you go to any step, and the icon with the issue count ("N to fix") collects fields to complete with "Fix" buttons; the "Blocks the calculation" label says what stops the result. The step number is in the page address, so you can save a link to a specific step. Underfloor heating has no wizard - it is one canvas with a toolbar, a side panel and the "This floor" guide, which shows what is done and what blocks the next step.
All modules save automatically - there is no save button. What you see when saving has a problem is in the article on troubleshooting.
Notifications
The bell in the side menu (in the top bar on a narrow screen) opens the "Notifications" inbox with categories (message, news, system, activity) and the "Mark all as read" and "Clear all" buttons. Some announcements appear as a pop-up with a "Next" button. Which messages also come by email you set in Settings.
Feedback, help and contact
"Send feedback" in the account menu has three forms: "Report a problem" (a screenshot is attached automatically), "Suggest a module" (which tool is missing) and "Email us" (questions and account matters; we reply by email, usually within 24 hours). "Help center" leads to the guides on heatalgo.com, and "What's new" to the changelog.
Phone, tablet, computer
Projects, the project view, the heat loss calculation, pump sizing, the client form, Algo, settings and billing work on a phone. Drawing in underfloor heating and the "Ducts" step in ventilation need a larger screen - a computer or a tablet. On a phone, underfloor heating shows the project's documents to download (the report and the bill of materials) and the "Ducts" step a note, both with a contact button. The other steps of the ventilation wizard work on a phone.
On a phone the rooms step in the heat loss calculation, pump sizing and ventilation has one sticky row with the current room and its position (e.g. "2 of 7"), and the room list slides up from the bottom of the screen. On short screens - a phone turned sideways, a small laptop - the app fits on the screen, and tall dialogs scroll inside.
A new version of the app
When we release a new version while you are working, a bar appears at the top: "A new version of HeatAlgo is available - reload to switch to it" with a "Reload" button. Your changes are saved, so reloading loses nothing.