Know Her vs
GF Tracker

A premium feature to track "multiple partners" tells you what GF Tracker is actually optimized for. It isn't understanding her.

★  One partner, one purpose
Know Her period tracker app — home screen widget showing her cycle phase

Date-idea generators and love-question packs aren't cycle tracking. They're a gimmick layered on top of it.

GF Tracker layers in date ideas filtered by her mood and your budget, curated "love question" packs, and — on premium — the ability to track multiple partners at once. If you specifically want relationship prompts alongside tracking, the date-idea generator is a genuinely thoughtful touch. But that premium multi-partner feature is worth sitting with: built around tracking more than one woman's cycle, it isn't a "relationship helper" so much as a different product wearing the same interface. Know Her does none of that. One partner, one cycle, no extras: her phase, her mood, her energy, when the next phase is coming — clearly and privately, without a single feature that has nothing to do with her.

What each app actually adds

One keeps it to the cycle. The other layers in more.

GF Tracker

  • Date ideas by cycle phase — filtered by budget, duration, and season.
  • Love question packs — from "Sugar-Sweet Moments" to "Heart-Melting Romance."
  • Multi-partner tracking — a premium feature to track more than one person.
  • No sign of self-calibration to her specific cycle over time.

Track multiple partners is a real, paid feature. Read into that whatever you want.

Know Her

  • The date her last period started. No extras, no question packs, no other partners.

One relationship, one cycle, one clear answer — and it gets more accurate the more you use it.

Feature comparison

Know Her vs GF Tracker, side by side.

Know Her GF Tracker
Built for male partners ✓ Purpose-built ✓ Purpose-built
She needs no app or account ✓ Yes ✓ Yes
You need an account to log in ✓ No Not stated in its App Store listing
Focused on the cycle only ✓ Yes ✗ Adds date ideas, love questions
Predictions self-calibrate ✓ Yes — learns her cycle ✗ No sign of self-calibration
Home screen widget ✓ Yes ✗ Not listed
Face ID / biometric lock ✓ Yes ✗ Not listed
Private notes on the calendar ✓ Yes — offline, only yours ✗ No
Single, clear pricing ✓ One plan, one price ✗ Multiple tiers, $2.99–$19.99/yr
Your price $19.99/yr — 14-day free trial Free, premium varies by tier

Design intent matters

What the app was built to solve changes everything about how it works.

Know Her

  • ✓ One relationship, one cycle, no extras
  • ✓ Dashboard: energy, mood, tips in plain language
  • ✓ Self-calibrates to her specific cycle over time
  • ✓ Widget: one-tap phase check from the home screen
  • ✓ Private notes and reminders on the calendar
  • ✓ Face ID lock for extra privacy

GF Tracker

  • ✓ Date-idea and love-question extras, if that's what you want
  • ✗ Multi-partner tracking as a premium feature
  • ✗ No indication predictions improve over time
  • ✗ No home screen widget found
  • ✗ Several pricing tiers instead of one clear plan

Price comparison

What it actually costs you.

Know Her Free to download — full access for 14 days

Then $19.99/year (or $2.99/month). One plan, one price — no tiers to compare or upgrade through.

GF Tracker $2.99–$19.99 premium plans, per year (varies by tier)

Free base app, but several premium tiers and lifetime options to sort through for the extras.

One clear price, no tiers to compare.

Common questions

About choosing between Know Her and GF Tracker.

GF Tracker adds relationship extras alongside cycle tracking — date ideas by phase, curated love-question packs, and a premium option to track multiple partners at once. Know Her does none of that. It does one thing: tells you where she is in her cycle, what that means for her mood and energy, and when the next phase is coming — clearly and without extras.
There's no indication that it does. GF Tracker's premium tier adds ovulation and pregnancy-chance predictions, but nothing suggests the app adjusts its estimates based on her actual logged cycles. Know Her self-calibrates — every confirmed period makes its predictions more accurate to her specific rhythm.
GF Tracker is free with in-app purchases; its premium plans vary widely by tier, from about $2.99 up to $19.99/year, plus lifetime options up to $49.99. Know Her is free to download, with a 14-day full-access trial, then a flat $19.99/year (or $2.99/month) — one price, no tiers to compare.
Yes. Know Her stores everything on your device — no account, no cloud, no sync. All data stays on your phone. You can lock it with Face ID or biometrics for extra privacy.
No. Know Her works entirely from information you enter yourself — no account for her, nothing to install, nothing to share. You just need the date her last period started. She doesn't even need to know you're using it.
Yes. Everything stays on your phone — no account, no cloud, no sync, nothing to leak. You can lock the app with Face ID or biometrics for extra privacy on top of that.
You get 14 days of full access, completely free. After that, Know Her runs on a simple subscription — monthly or annual. Cancel anytime directly in your App Store settings.
No. Know Her is designed to help you understand and plan around her cycle — it's not a medical device, diagnostic tool, or method of contraception. For health decisions, always consult a healthcare professional.

More comparisons

See how Know Her stacks up against other apps.

Know Her vs Flo for Partners Know Her vs Clue Connect Know Her vs Stardust Know Her vs Selin Know Her vs Maya Know Her vs Yuni Know Her vs Phases Know Her vs DuoSync Know Her vs Mayday

Available on
iOS & Android.

Free for 14 days.

No commitment. Cancel anytime.

Download on the App Store
Get it on Google Play