Rocket Money finds subscriptions and negotiates bills. The finding is useful. The fee is the problem: Premium is $7 to $14 a month and bill negotiation keeps 35 to 60% of the first year's saving. Budgetfold tracks subscriptions on the free plan and leaves the phone call to you.
Call your cable company. Rocket Money's negotiators do, and they charge a percentage of the saving for it. Most bills can be lowered with one call and the words "I am thinking of cancelling"; we would rather you keep the whole saving.
If you will never make that call yourself, possibly. For everyone else the free tier of a budgeting app that lists your subscriptions gets you the same visibility, and the money stays with you.