Best Ovulation Tests 2026: Complete Buying Guide
We tested and compared the top OPKs to help you find the perfect match for your TTC journey.
Our Top Picks
- Best Overall: Clearblue Advanced Digital — Most accurate, easiest to read
- Best Value: Easy@Home 50-Pack — Great quality at the best price
- Best for Beginners: Clearblue Digital — Simple smiley face display
- Best Premium: Mira Fertility Monitor — Lab-quality hormone readings
- Best Budget: Pregmate 50-Pack — Reliable and affordable
Quick Comparison Chart
| Product | Type | Tests Included | Price | Best For |
|---|---|---|---|---|
| Clearblue Advanced Digital | Digital | 20 tests | $35-45 | Best Overall |
| Easy@Home 50-Pack | Strips | 50 OPK + 20 HCG | $16-20 | Best Value |
| Pregmate 50-Pack | Strips | 50 tests | $15-18 | Budget Pick |
| Clearblue Digital | Digital | 10 tests | $25-30 | Beginners |
| Mira Fertility Monitor | Smart Monitor | Device + wands | $199+ | Premium/Data-Driven |
| Inito Fertility Monitor | Smart Monitor | Device + strips | $149+ | Confirms Ovulation |
| PREGMATE Digital | Digital | 20 tests | $20-25 | Budget Digital |
| Wondfo LH Strips | Strips | 50 tests | $12-15 | Ultra Budget |
Our Top Picks: Detailed Reviews
Clearblue Advanced Digital Ovulation Test
✓ Pros
- Detects 4 fertile days (vs. 2 with basic OPKs)
- Easy-to-read digital display
- Tests both estrogen AND LH
- 99% accurate at detecting LH surge
- No line interpretation needed
✗ Cons
- More expensive per test
- Must use first morning urine
- Can't reuse holder for other brands
The Clearblue Advanced Digital is our top pick because it detects both estrogen and LH, giving you a wider fertile window. Most OPKs only detect the LH surge 24-36 hours before ovulation. This one also detects the estrogen rise that happens before LH, giving you up to 4 fertile days notice.
The digital display shows a flashing smiley for "high fertility" (estrogen detected) and a solid smiley for "peak fertility" (LH surge). No squinting at lines required.
Best for: Anyone who wants the most accurate, easiest-to-use option and is willing to pay more for it.
Easy@Home 50 Ovulation + 20 Pregnancy Tests
✓ Pros
- Incredible value (50 OPK + 20 HCG tests)
- Free Premom app integration
- 99% accurate at LH detection
- Over 100,000 positive reviews
- Test multiple times per day affordably
✗ Cons
- Requires line interpretation
- App isn't perfect at reading photos
- Some learning curve for beginners
Easy@Home offers unbeatable value. At under $20 for 50 OPKs and 20 pregnancy tests, you can test twice daily without guilt. This is especially valuable if you have irregular cycles or want to catch a short LH surge.
The free Premom app lets you photograph your tests for digital analysis and tracking. The app assigns a test/control ratio, making interpretation easier than eyeballing alone.
Best for: Budget-conscious users who don't mind learning to read test lines. Perfect for testing multiple times per day.
Clearblue Digital Ovulation Test
✓ Pros
- Simple smiley face = no interpretation
- 99% accurate at detecting LH surge
- Easy to use
- Clear instructions
✗ Cons
- Only detects LH (2-day window)
- More expensive per test than strips
- Fewer tests per box
The standard Clearblue Digital (without "Advanced") is perfect for beginners who want simplicity. You get a clear smiley face when you're fertile—no line interpretation, no ambiguity.
Unlike the Advanced version, this only tests LH (not estrogen), so you get a 24-36 hour warning rather than 4 days. But for many users, that's enough.
Best for: First-time OPK users who value simplicity over maximum data.
Mira Fertility Tracker
✓ Pros
- Shows actual hormone concentrations (numbers)
- Lab-quality accuracy
- Tracks LH, estrogen, PdG, and FSH
- Great for irregular cycles
- Confirms ovulation (not just predicts)
✗ Cons
- Expensive upfront ($199)
- Ongoing wand costs (~$50-80/month)
- Steeper learning curve
Mira is for users who want data, not just yes/no answers. Instead of showing a line or smiley, Mira displays your actual hormone levels—like "LH: 45 mIU/mL." This is the same technology fertility clinics use.
The Plus wands test LH, estrogen, and PdG (progesterone metabolite), so you can confirm ovulation actually occurred—something basic OPKs can't do.
Best for: Data-driven users, those with irregular cycles, PCOS, or anyone who wants maximum information. Also great for people working with a fertility specialist.
Pregmate 50 Ovulation Test Strips
✓ Pros
- Lowest cost per test
- FDA registered
- 99% accurate
- Simple to use
✗ Cons
- No app integration
- Line interpretation required
- Basic packaging
Pregmate strips work just as well as more expensive options. They're FDA registered, 99% accurate, and cost about $0.30 per test. If you just want reliable OPKs without bells and whistles, these deliver.
Best for: Users who want the cheapest reliable option and don't need app integration.
Inito Fertility Monitor
Inito is similar to Mira but clips onto your smartphone instead of using a standalone device. It tests 4 hormones including PdG to confirm ovulation occurred. Slightly cheaper than Mira with similar functionality.
Best for: Users who want ovulation confirmation without Mira's price tag.
Also Worth Considering
Wondfo LH Strips ($12-15 for 50): Ultra-budget option. Same accuracy as other strips, just cheaper packaging. Check Price →
PREGMATE Digital ($20-25 for 20): Budget digital option if you don't want to interpret lines but can't afford Clearblue. Check Price →
Clearblue Fertility Monitor ($150-180): The original digital fertility monitor. Tests both estrogen and LH. Good option if you want a dedicated device. Check Price →
How OPKs Work
Ovulation predictor kits detect luteinizing hormone (LH) in your urine. Here's what happens:
- Throughout your cycle, LH is present at low baseline levels
- About 24-36 hours before ovulation, LH surges dramatically
- OPKs detect this surge, telling you ovulation is imminent
- You have sex when you get a positive, catching your fertile window
Strips vs. Digital vs. Monitors
| Type | How It Works | Advance Notice | Price |
|---|---|---|---|
| Test Strips | Shows two lines; positive when test line is as dark as control | 24-36 hours | $0.20-0.40/test |
| Digital (LH only) | Shows smiley face when LH surge detected | 24-36 hours | $2-3/test |
| Digital (LH + Estrogen) | Shows "high" then "peak" fertility | Up to 4 days | $2-3/test |
| Smart Monitors | Shows actual hormone concentrations | Varies; confirms ovulation | $3-5/test + device |
How to Choose the Right OPK
Choose Test Strips If:
- You're on a budget
- You want to test multiple times per day
- You don't mind learning to read lines
- You have regular cycles
Choose Digital OPKs If:
- You want clear yes/no answers
- You're new to OPKs
- You find line interpretation stressful
- You're willing to pay more for convenience
Choose Smart Monitors (Mira/Inito) If:
- You have irregular cycles or PCOS
- You've been TTC for several months without success
- You want to confirm ovulation actually occurred
- You're data-driven and want detailed hormone tracking
- You're working with a fertility specialist
How to Use OPKs Correctly
When to Start Testing
Start testing about 4-5 days before you expect to ovulate. For a 28-day cycle, that's around day 10. Use this formula:
Start testing on: Cycle length - 17
Example: 30-day cycle → Start testing on day 13
Best Time of Day to Test
- Strips: Afternoon (2-6pm) often works best. LH surges typically happen in the morning, and it takes a few hours to appear in urine.
- Clearblue Digital: First morning urine as directed
- Mira/Inito: Follow device instructions
Tips for Accurate Results
- Reduce fluid intake for 2 hours before testing (diluted urine = weaker signal)
- Test at the same time daily
- Don't use first morning urine for strips (unless directions say otherwise)
- Read results within the time window (usually 3-10 minutes)
Interpreting Strip Results
Negative: Test line is lighter than control line
Positive: Test line is as dark or darker than control line
When you get a positive, ovulation will likely occur in the next 24-36 hours. Have sex that day and the next 1-2 days.
➡️ Related: How to Use OPKs: Complete Tutorial
Frequently Asked Questions
Can I use OPKs if I have PCOS?
Yes, but be aware that PCOS can cause elevated baseline LH, leading to false positives. A smart monitor like Mira that shows actual hormone numbers (rather than just positive/negative) may be more helpful for PCOS.
Why do I never get a positive OPK?
Possible reasons: you're testing at the wrong time of day, your surge is short (try testing twice daily), you're missing your fertile window (adjust when you start testing), or you may not be ovulating. If you consistently don't see positives, consult your doctor.
Why do I always get positive OPKs?
This can happen with PCOS (elevated baseline LH) or around menopause. It can also be a reading error—make sure the test line is truly as dark as the control, not just visible. Consider trying a digital test for clearer results.
Can OPKs detect pregnancy?
Sometimes! LH and hCG are structurally similar, so a very high hCG level might trigger a positive OPK. However, OPKs are not reliable for pregnancy detection. Use actual pregnancy tests instead.
Do I need to test multiple times per day?
Not always, but it can help catch a short surge. Some people's LH surge lasts only 12-24 hours, so testing once daily might miss it. If you have regular cycles and consistently catch your surge, once daily is fine. If you keep missing it, try morning and evening.
The Bottom Line
For most people, we recommend starting with Easy@Home strips—they're affordable, accurate, and the Premom app makes tracking easy. If you find line interpretation stressful or want more fertile days notice, upgrade to Clearblue Advanced Digital.
If you have irregular cycles, PCOS, or have been trying for a while, consider investing in Mira for the detailed hormone data that can help you and your doctor understand what's happening.
The best OPK is the one you'll use consistently. Pick what fits your budget and comfort level, and don't stress about getting the "perfect" option—any of these will help you identify your fertile window. 💚