Many promote Octopus as cheaper due to their Tracker and Agile Tariffs. But that is not comparing with like; whether these tariffs suit a customer depends on their attitude to risk, and if they want headspace taken up with ever-changing rates, then you cannot recommend a tracker without a clear understanding of the customer. Not everyone will want to commit to checking trends in unit rates every couple of weeks to mitigate risk. Perhaps in order to plan and budget, they want to fix and forget even if they then pay now a high forward buying hedging premium due to volatility in prices via Octopus rather than take risks themselves under Tracker.
There are various ways to be alarted to tommorrow's Tracker prices, or even predictions beyond, but the get rougher further out, such as websites, apps, or Telegram message. But most people don't have headsapce for this.