Nine tools. Nothing to sign up for.
Some work off published prices and need nothing from you — no account, no account key. Others read your own Octopus data, and do it inside your browser, so it never reaches us.
9 tools showing
No account needed
Published prices only. Nothing to connect, nothing to remember.
- Tariff chooserAnswer a few questions about your home and narrow 20 tracked rate families to a handful worth reading about.Start the chooser →
- Find your regionGreat Britain has fourteen electricity regions and they price differently. Find yours without putting a postcode in a link.Find my region →
- Best timeSay how long something takes and we’ll pick the cheapest published window for it.Find a window →
- Appliance optimiserPlan several appliance runs against published half-hours, each on its own schedule.Plan my runs →
- EV charging costEstimate one home charging session across published Agile, Go and Intelligent Go price windows.Estimate charging cost →
Your own usage
Connect your Octopus account in this browser.
What we never see
Your browser talks to Octopus directly. Your account’s API key, account number, MPAN, meter serials and every reading stay on your device — none of it passes through this site.
- Your API key
- Account number
- MPAN
- Meter serials
- Any reading
The connection lasts for this browser session by default. Remembering it on this device is a separate, explicit choice, and “Forget account” clears both stores. No consumption data is ever stored.
- Stays in your browserMy usageDaily totals, where your use falls across the day, and an estimated baseload — from complete London days only.See my usage →
- Stays in your browserData gapsFind missing or conflicting half-hours in your readings. A genuine zero is not treated as a gap.Check my readings →
- Stays in your browserCompare my usageRank supported import tariffs against what you actually used, rather than an assumed profile.Rank against my usage →
- Stays in your browserCustom tariffWrite your own tariff definition, keep it on this device, and test it on the same days as the published ones.Build a tariff →
What these tools can’t doRead more
Any cost or baseload figure is an estimate, not a bill, a quote or a device reading. They don’t reproduce discounts, dispatch overrides, exit fees, export credits or supplier billing adjustments. The private account tools need JavaScript for the browser-held connection, and there’s no public data API or download.
Why a postcode never ends up in a linkRead more
Your postcode is sent once, in a request body, to work out your grid region — it never enters this site’s URL, storage, cache or logs, and it’s discarded after the lookup. Only the region itself is remembered, on your device.