Best Overall
ProbaBaby
Pregnancy-specific depth: contraction timer with Live Activity, interactive hospital bag, real genetics predictions, Apple Watch, ad-free. Flo's pregnancy mode is a bolt-on; ProbaBaby is the product.
View on App StoreProbaBaby vs Flo: Cycle-First vs Pregnancy-First in 2026
Flo's pregnancy mode is a bolt-on; ProbaBaby is purpose-built. Here's when each one is the right call.
Flo became a household name by being the best menstrual-cycle and fertility tracker on the market. When you log a positive pregnancy test, Flo flips into its pregnancy mode — which is competent but shallower than dedicated trackers. There's no contraction timer. No hospital-bag tool. No birth-plan builder. Symptom and weight tracking are present but limited compared to ProbaBaby.
ProbaBaby is the inverse: nothing to do with cycle tracking, but deep on every pregnancy and birth-prep feature. Real Mendelian-genetics predictions, Apple Watch app, Live Activities, ad-free, 30+ in-app free tools.
If you're mid-pregnancy and already using Flo, continuity is reasonable. If you're starting fresh and want serious pregnancy tooling, ProbaBaby is the deeper product.
Best for Cycle Tracking + Continuity
Flo
If you've been using Flo for cycle tracking, continuing into pregnancy mode is seamless. ProbaBaby doesn't do cycle tracking.
View on App StoreFeature-by-feature comparison
| ProbaBaby | Flo | |
|---|---|---|
| Pregnancy Tracking | ||
| Week-by-week timeline | ||
| Daily content / tips | ||
| 3D fetal model | ||
| Health & Symptoms | ||
| Symptom logging | ||
| Mood tracking | ||
| Weight tracking + trend | ||
| Sleep tracking | ||
| Birth Prep | ||
| Hospital bag (interactive) | ||
| Birth plan builder + PDF | ||
| Contraction timer | ||
| 5-1-1 rule alert | ||
| Kick counter | ||
| Tools & Calculators | ||
| Due date calculator | ||
| 30+ in-app free tools | ||
| Genetics-based predictions | ||
| iOS Native Features | ||
| Apple Watch app | ||
| Live Activities | ||
| Dynamic Island support | ||
| Home Screen widgets | ||
| Privacy & Data | ||
| No ads | ||
| No third-party tracking | ||
| Offline-first storage | ||
| Doctor-grade data export | ||
| Pricing & Localization | ||
| Free tier | ||
| Languages supported | 32 | 30+ |
| Turkish (Türkçe) | ||
App-by-app review
ProbaBaby
Genetics-powered pregnancy & baby tracking with deep iOS integration.
- Strengths
- Real Mendelian-genetics baby predictions with AI visualization
- Live Activities + Dynamic Island + Apple Watch companion
- 30+ in-app free tools across pregnancy and postpartum
- Offline-first with on-device storage of sensitive data
- 32 languages with RTL support
- Weaknesses
- iOS only (no Android)
- No 3D baby model (only Pregnancy+ has one)
- Newer brand — fewer App Store reviews than competitors
- Best for
Parents who want a comprehensive, privacy-conscious app with deep iOS features and accurate science-backed predictions. Excellent for iPhone + Apple Watch users.
- Pricing
Free download. All tracking and 30+ in-app tools are free. Only genetic baby predictions are paid — sold as credit packs with prices set per region by the App Store.
Flo
Cycle tracker first, pregnancy mode second. Strong global reach.
- Strengths
- Best cycle/fertility tracking in the category (when planning)
- 30+ languages — strong localization
- AI-driven personalized insights
- Mature widget support on both platforms
- Weaknesses
- Pregnancy mode is secondary; less depth than dedicated trackers
- FTC settlement in 2021 over health data sharing — trust concerns
- No contraction timer, kick counter, or hospital-bag tools
- Premium gates most pregnancy-specific features
- Best for
Existing Flo users transitioning from cycle tracking to pregnancy mode. Not the best choice if you want depth in pregnancy-specific features.
- Pricing
Free with limited features. Premium subscription unlocks pregnancy-mode features; prices set per region by the App Store.
How we tested
We installed Flo on a test iPhone alongside ProbaBaby in May 2026 and used both daily for two weeks. We logged the same symptoms, packed the same hospital bag, ran each app's contraction timer, and explored every free tool.
Ratings use the same scale across all our comparison pages: ✅ full (present and well-built), ⚠️ partial (limited, shallow, or paywalled), ❌ none. Some rows show values (price, language count) instead of a rating.
Flo is primarily a menstrual cycle tracker with a pregnancy mode bolted on. ProbaBaby is a pregnancy tracker from the ground up. The choice usually comes down to whether you're already a Flo user (continuity matters) or starting fresh and want depth in pregnancy-specific features.
Pricing and feature availability are checked at publish time. We update this page when Flo ships a new version.