Best BBT Thermometers for TTC 2026
From basic thermometers to smart wearables, find the right BBT tracker for your fertility journey.
Our Top Picks
- Best Overall: Tempdrop — Wearable, works with any sleep schedule
- Best Budget: Easy@Home Smart BBT — Bluetooth syncing at a great price
- Best Basic: Easy@Home Basic BBT — Simple, accurate, under $10
- Best Mid-Range: Femometer Vinca II — Smart features, affordable
- Best Premium: Ava Bracelet — Tracks multiple biomarkers
Quick Comparison Chart
| Product | Type | App Sync | Price | Best For |
|---|---|---|---|---|
| Tempdrop | Wearable | Yes | $149-219 | Best Overall |
| Easy@Home Smart BBT | Oral | Bluetooth | $25-30 | Best Budget Smart |
| Easy@Home Basic BBT | Oral | No | $8-12 | Best Basic |
| Femometer Vinca II | Oral | Bluetooth | $20-25 | Mid-Range |
| Ava Bracelet | Wearable | Yes | $279+ | Premium Multi-Sensor |
| iSnow Med BBT | Oral | Bluetooth | $15-20 | Budget Option |
Our Top Picks: Detailed Reviews
Tempdrop Fertility & Ovulation Tracker
✓ Pros
- Wear overnight—no wake time requirements
- Works with irregular sleep schedules
- Algorithm filters out noise for accurate temps
- Syncs with Fertility Friend, Read Your Body, and more
- No daily oral temp taking
- Comfortable armband design
✗ Cons
- Expensive upfront ($149-219)
- Takes 2 weeks to calibrate to your body
- Another device to charge
Tempdrop is a game-changer for BBT tracking. Instead of waking at the exact same time every morning to take your temperature, you simply wear the sensor on your arm while you sleep. The algorithm analyzes your overnight temps and gives you an accurate reading—even if you got up to pee, nursed a baby, or slept in.
This makes Tempdrop perfect for shift workers, parents of young children, anyone with insomnia, or simply people who don't want to wake up at the same time every day.
It syncs with popular fertility apps including Fertility Friend, Read Your Body, and Kindara. After 2 weeks of calibration, you'll get reliable data that confirms ovulation.
Best for: Anyone with irregular sleep, shift workers, parents, or anyone who wants hassle-free BBT tracking.
Easy@Home Smart Basal Thermometer
✓ Pros
- Bluetooth syncs to Premom app automatically
- Backlit display for dark-room readings
- 1/100th degree accuracy
- Stores last temp if you fall back asleep
- Excellent value for smart features
✗ Cons
- Still requires same-time waking
- Bluetooth can occasionally disconnect
- App integration only with Premom
The Easy@Home Smart BBT offers the best value for a connected thermometer. It syncs automatically via Bluetooth to the Premom app, so your temperature is logged without manual entry. The backlit display is perfect for taking your temp in the dark before getting up.
If you're already using Easy@Home OPKs with Premom, this keeps all your data in one place.
Best for: Budget-conscious users who want app syncing, Premom users.
Easy@Home Digital Basal Thermometer
✓ Pros
- Under $10
- 1/100th degree accuracy
- Stores last reading
- Simple and reliable
- Large, easy-to-read display
✗ Cons
- No app sync—manual logging required
- No backlight
- Beep can be loud
If you want a no-frills BBT thermometer that just works, this is it. The Easy@Home basic thermometer reads to 1/100th of a degree (essential for BBT tracking), stores your last reading if you forget, and costs less than $10.
You'll need to manually log temps in your app of choice, but many TTC'ers prefer this control.
Best for: Anyone who wants simple, cheap, and accurate.
Femometer Vinca II BBT Thermometer
✓ Pros
- Bluetooth syncing to Femometer app
- 300 readings storage
- Sleek design
- Fast reading (30-60 seconds)
✗ Cons
- App is less polished than Premom
- Still requires consistent wake time
The Femometer Vinca II offers smart features at a competitive price. It syncs via Bluetooth to the Femometer app, which provides cycle analysis and predictions. The sleek design and fast reading time make it pleasant to use.
Best for: Users who want smart features and prefer the Femometer ecosystem.
Ava Fertility Bracelet
✓ Pros
- Tracks 5+ biomarkers (temp, pulse, HRV, breathing, sleep)
- Wear overnight—no wake time needed
- Claims to detect 5 fertile days
- Pregnancy mode after conception
✗ Cons
- Very expensive ($279+)
- Mixed reviews on accuracy
- Subscription required for full features
- Not recommended for irregular cycles
Ava tracks multiple biomarkers beyond just temperature, using algorithms to identify your fertile window. It's worn like a bracelet overnight. Some users love it; others find the predictions less accurate than traditional OPK + BBT methods.
Best for: Users who want comprehensive wearable tracking and have regular cycles. Consider Tempdrop first unless you specifically want multi-biomarker tracking.
How BBT Tracking Works
Your basal body temperature is your temperature at complete rest. It shifts slightly throughout your menstrual cycle due to hormonal changes:
- Before ovulation: Lower temps (typically 97.0-97.5°F / 36.1-36.4°C)
- After ovulation: Higher temps (typically 97.6-98.6°F / 36.4-37°C)
The temperature rise is caused by progesterone, which your body produces after ovulation. By charting daily, you can see when this shift happens and confirm that ovulation occurred.
Important: BBT Confirms, Not Predicts
BBT tracking tells you ovulation already happened—the temp rise occurs after the egg is released. By itself, it doesn't give advance warning. That's why BBT is best combined with OPKs (which predict ovulation beforehand).
Over time, your BBT pattern helps you understand your typical ovulation day, making future cycles more predictable.
Reading Your Chart
Look for a sustained rise of at least 0.2°F (0.1°C) that lasts 3+ days. Most apps will draw a "coverline" to help you visualize the shift. If your temperature stays elevated for 18+ days, it's a strong sign of pregnancy.
➡️ Related: BBT Charting for Beginners: Complete Guide
How to Choose the Right BBT Thermometer
Choose a Basic Thermometer If:
- You're on a tight budget
- You don't mind manual logging
- You wake at consistent times
- You want simplicity
Choose a Smart/Bluetooth Thermometer If:
- You want automatic logging
- You're already using Premom or Femometer apps
- You want backlit display for dark mornings
- You wake at consistent times
Choose a Wearable (Tempdrop/Ava) If:
- You have irregular sleep or work shifts
- You have a baby/toddler disrupting sleep
- You don't want to take temps every morning
- You're willing to invest for convenience
💡 Our Recommendation
If you have regular sleep and wake times, start with the Easy@Home Smart BBT—it offers the best value for smart features. If your sleep is unpredictable, Tempdrop is worth the investment for reliable data without the hassle.
Frequently Asked Questions
Do I really need a special BBT thermometer?
Yes—regular fever thermometers only measure to 0.1°F, but BBT changes are as small as 0.2°F. You need a thermometer that reads to 0.01°F (1/100th degree) to detect the ovulation shift.
What time should I take my BBT?
Take it immediately upon waking, before any activity (even sitting up). Consistency matters more than the specific time, but most people aim for the same 30-minute window daily. Wearables like Tempdrop eliminate this requirement.
Why is my BBT chart so erratic?
Common causes: inconsistent wake times, drinking alcohol, poor sleep, illness, room temperature changes, or taking temp after moving around. Try the same conditions each day. If charting remains difficult, consider a wearable.
Oral or vaginal temping?
Both work. Vaginal temps are often more stable (less affected by mouth breathing or room temp), but oral is more convenient. Pick one method and stick with it—don't switch mid-cycle.
Is BBT tracking enough on its own?
BBT confirms ovulation after it happens, but doesn't predict it in advance. For TTC, we recommend combining BBT with OPKs: use OPKs to predict ovulation, then BBT to confirm it occurred. Cervical mucus monitoring adds another layer.
The Bottom Line
For most people, the Easy@Home Smart BBT offers the best balance of features and value. If budget is tight, the basic Easy@Home thermometer works perfectly well—you'll just log temps manually.
If you have disrupted sleep or irregular wake times, invest in Tempdrop. It's more expensive upfront but eliminates the frustration of unreliable temps.
Whatever you choose, the key is consistency. BBT tracking takes 2-3 cycles to learn, but the confirmation that ovulation occurred is invaluable data for your fertility journey. 💚