Trying to conceive + cycle tracking

Cycle trackers: evidence and price

Key point: Hormones help predict ovulation. Temperature mainly confirms it afterward.

Best evidence + valueClearblue/LH tests + basic BBT

Best convenienceTempdrop + LH tests

Most hormone detailMira Max

Comparison

Prices include VAT where stated. Promotions may change.

Product	Measures	Timing	EU price	Science	Main limitation
Tempdrop 2.0 App: 3.6/5, 595 reviews	Upper-arm temperature overnight	After Confirms thermal shift	€229Premium optional: €49/year	194 cycles: 93.3% within ±2 days of an LH-derived date. Retrospective, company-led. Study	Does not open the fertile window. No pregnancy/live-birth trial.
Clearblue Advanced Digital Amazon: 4.4/5, 10,741 ratings	Urinary E3G + LH	Before Predicts high/peak fertility	€49.9930 tests	Urine-test timing: 7 RCTs, 2,464 participants; probably improves pregnancy and live birth. Review	Consumables. PCOS or repeated hormone rises can complicate results.
Basic BBT + LH strips	Morning BBT + urinary LH	Both LH predicts; BBT confirms	About €23+€12.50 thermometer + strips	LH has the stronger TTC evidence. BBT is useful for a sustained post-ovulation pattern. Review	Requires consistent morning measurements and manual charting.
cyclotest mySense App: 4.8/5, 1.25K reviews	Bluetooth BBT	After Confirms thermal shift	€139.90Lifetime app access	CE medical-device thermometer/app. No branded pregnancy-outcome study found.	Still requires measuring immediately after waking.
Natural Cycles + NC Band App: 4.2/5, 23.5K reviews	Wrist temperature + motion	Mostly after Algorithm forecasts	€119.99/yearCurrent annual offer includes band	Regulated medical-device app. Stronger contraception evidence; TTC outcome benefit unproven.	Subscription required.
Oura Ring 5 App: 4.4/5, 41.1K reviews	Finger temperature + wellness data	After Estimates ovulation date	€429+ €69.99/year	1,155 ovulatory cycles; 96.4% detected, mean error 1.26 days. Company-led. Study	Only LH-positive cycles studied. Expensive for fertility alone.
trackleCatch App: 4.6/5, 476 reviews	Vaginal core temperature + mucus input	Both Mucus predicts; temp confirms	€219.90Current sale price	EU medical-device listing. No direct branded accuracy study found.	Vaginal wear/cleaning; fixed sensor life around 30 months.
Mira Max App: 3.2/5, 887 reviews	Quantitative urinary E3G + LH + PdG	Both Predicts and confirms	€246.95Refill: €95.95 / 20 wands	Hormone method is useful; direct branded validation and pregnancy outcomes are limited.	10-20 wands per cycle. Highest recurring cost.

Science

1. Timing Review

E3G/mucus rises first. LH rises near ovulation. Temperature/PdG rises afterward.

2. Pregnancy outcomes Review

Urinary ovulation tests probably improve pregnancy and live birth: live-birth RR 1.36; pregnancy RR 1.28.

3. Wearables Review

2026 review: 27 studies. Exact-day accuracy 0.56; accuracy within ±2 days 0.90. Evidence certainty: very low.

Tempdrop study

Read study

258recruited

125analyzed

194cycles

93.3%within ±2 days

Compared with an LH-derived date, not ultrasound.
Algorithm tested retrospectively after the cycle.
Only cycles 24-35 days with enough data were included.
Tempdrop founder/CEO and employee were authors.
No trial shows improved pregnancy or live birth.

Recommendation

Lowest cost + best evidence: Clearblue/LH tests + basic BBT.

Easiest temperature tracking: Tempdrop + LH tests.

Detailed hormones: Mira, only if the recurring cost is acceptable.

Main sources

Not medical advice. Prices, subscriptions and ratings can change.