The tool doesn't really matter as much as where you put it and what triggers you to look at it. I tried the dedicated tracker thing for a while and it just became another app icon I'd scroll past. What actually changed for me was putting my resolutions directly into my phone's calendar as recurring events - not just once on January 1st, but as weekly check-in reminders that actually pop up with a notification. That way they're not something I have to remember to go find.
The key difference between this and just burying stuff in Notes is the friction. Are you thinking of checking in every week, or would monthly reviews work better for your style? Because if you go with the calendar approach, you could set it up so you get a Sunday evening reminder to review the past week, and that forces the conversation with yourself instead of letting it disappear. You could even make it a shared calendar with someone else if accountability helps you - that adds a little social pressure without needing a whole separate app.
One thing to consider: what specifically made you lose track by February before? Was it that you forgot the resolutions existed, or that you felt like you were failing at them so you stopped checking? Because if it's the second one, no app will fix that - you'd need resolutions that are actually realistic for your life, or smaller wins along the way so you don't feel defeated. But if it's just out of sight out of mind, the calendar recurring event thing tends to stick better than anything else I've tried because it interrupts your day rather than waiting for you to find it.