Set up two layers. That is the whole strategy.
The best iOS apps for tracking brokerage fees share one job: telling you what your broker charged before your statement does. Fee schedules change quietly. The investors who notice are the ones with something watching.
Layer one: your broker's own app. It shows your actual activity and statements. That is ground truth. Layer two: a broker fee alert app with push notifications watching for schedule changes and promo deadlines. iOS notification summaries are genuinely useful here. Bundle the money alerts into a morning summary instead of letting them interrupt your day. Urgent is a setting, not a personality.
What should the fee tracker watch? For most people, three things. Margin rate changes if you borrow. Account and maintenance fee changes if you hold. Promo and bonus deadlines if you are earning one. Everything else on the fee schedule is scenery.
Be skeptical of precision theater. An app that claims to compute your exact annual fees to the penny is guessing at your future behavior. What it can do honestly is estimate from your past activity and flag when reality drifts from the estimate. That is useful. False precision is marketing.
A fee audit calculator SaaS fits here too: run it once a year, compare your estimated annual cost across brokers, and let the iOS apps handle the day-to-day watching. A full brokerage fees comparison once a year, automated alerts the rest of the time.
One iOS-specific tip: use Screen Time to see how often you open the fee tracker versus the trading app. If the ratio is backwards, the fees are not your problem. The trading is.
Rather wrestle one fee schedule with a human than ten apps alone? BrokerCompare's onboarding calls do the fee audit with you. Start at brokercompare.fyi.