The Short Version
These three get compared constantly, but only two are the same kind of device. Mira and Inito are quantitative urine hormone monitors — they chart LH, estrogen (E3G), and progesterone metabolite (PdG), predicting your fertile window and confirming ovulation afterward. Kegg is something else entirely: a kegel-ball-shaped sensor that measures the electrolyte properties of cervical fluid to detect the fertile-window shift, with a two-minute daily reading and no consumables. Kegg's zero-refill cost model and simplicity are appealing; its tradeoff is that it detects the fertile window only — no hormone values, no LH surge, no ovulation confirmation. Want maximum information? Mira or Inito. Want minimum daily friction and no strip budget? Kegg — ideally paired with a few cheap LH strips.
Put Mira, Inito, and kegg side by side and you're not comparing three brands of the same thing — you're comparing two quantitative hormone monitors against a cervical-fluid sensor. They answer overlapping but genuinely different questions, which is why so many people bounce between their product pages feeling confused. Let's un-confuse it.
The three-way snapshot
| Mira | Inito | kegg | |
|---|---|---|---|
| Technology | Urine hormone analysis (analyzer + wands) | Urine hormone analysis (phone-clip + strips) | Cervical fluid impedance sensing |
| Measures | LH, E3G, PdG (+FSH via Max) | LH, E3G, PdG, FSH | Electrolyte trend in cervical fluid |
| Predicts fertile window | Yes | Yes | Yes — its core job |
| Detects LH surge | Yes | Yes | No |
| Confirms ovulation | Yes (PdG) | Yes (PdG) | No |
| Daily routine | Dip wand, insert, sync | Dip strip, clip, scan | ~2-minute internal reading |
| Consumables | Wands, ongoing | Strips, ongoing | None |
| Cost shape | Device + refills forever | Device + refills forever | Device once |
Mira and Inito: the hormone-data tier
We compare these two directly in Inito vs Mira, so here's the compressed version. Both chart real hormone values: estrogen's rise opens your fertile window, the LH value marks the surge, and the post-surge PdG climb confirms ovulation happened — the capability that defines this tier. Mira runs on a standalone analyzer with a wand lineup; Inito runs everything through one four-hormone strip read by your phone's camera (full breakdown in our Inito review).
Their shared cost structure is the thing to internalize: hardware once, consumables forever, at several times the per-test price of basic strips. You're buying information density, and for irregular cycles, PCOS, or suspected ovulation problems, that density earns its price.
Kegg: the different animal
Kegg is a small, kegel-ball-shaped device you insert for about two minutes each day, ideally at a consistent time. It passes a gentle, imperceptible current through cervical fluid and measures impedance — a proxy for the electrolyte changes that estrogen drives as ovulation approaches. The app turns the trend into a fertile-window prediction.
What that design buys you:
- No consumables, ever. The purchase price is the whole price. Over a year of tracking, that changes the math dramatically against strip-and-wand systems.
- A genuinely fast routine. Two minutes, no urine handling, no strip photography, no wondering about hydration effects on concentrations.
- A signal OPKs miss. Cervical fluid changes are a classic fertility-awareness sign — kegg essentially automates what manual cervical mucus checking observes by hand.
And what it costs you in capability:
- No hormone values. Nothing to chart against lab work, nothing quantitative for your doctor.
- No LH surge detection. Kegg says the window is open; it doesn't pinpoint the surge inside it.
- No ovulation confirmation. The post-ovulation question — did an egg actually release? — is outside its physics.
- Signal quality varies. Infections, certain medications, and conditions that alter cervical fluid can muddy readings, and PCOS cycles can make the pattern harder to call.
Matching device to situation
- Irregular cycles or PCOS: Mira or Inito. Quantitative baselines beat every single-signal method when cycles refuse to behave. (Kegg's fluid signal can also run noisier with PCOS.)
- Need to confirm ovulation: Mira or Inito, full stop — PdG is the only at-home confirmation route among these three.
- Regular-ish cycles, hate daily fuss, hate recurring costs: Kegg, optionally with a few LH strips for surge precision.
- Building a case file for a fertility workup: Mira or Inito — numeric charts translate directly into clinical conversations. If that workup is already on the horizon, here's what a reproductive endocrinologist actually does.
- Fertility awareness lifestyle, TTC casually: Kegg's automation of the cervical-fluid sign fits naturally alongside BBT charting.
Which should you choose?
Choose Mira or Inito if information is the point — irregular cycles, PCOS, unexplained months of trying, or a fertility workup ahead. Between the two, Mira suits standalone-analyzer preferences and Marquette-adjacent users; Inito suits one-strip simplicity. The head-to-head settles it.
Choose kegg if friction and refill costs are the point — you want the fertile window flagged with a two-minute habit and a one-time price, and you can live without hormone numbers and ovulation confirmation. Add cheap LH strips and you've built 80% of a monitor's function for a fraction of its lifetime cost.
Don't choose any of them to answer "why isn't this working?" after a year of well-timed trying. That question belongs to a doctor — and if treatment economics are the obstacle, options like IVF in Colombia exist precisely because they shouldn't be.
Frequently asked questions
What does kegg actually measure?
Kegg measures electrolyte changes in cervical fluid using impedance sensing. Cervical fluid's composition shifts as estrogen rises approaching ovulation, and kegg's algorithm reads that trend to flag your fertile window. It does not measure hormones directly and does not detect the LH surge or confirm ovulation.
Is kegg cheaper than Mira or Inito?
Over time, usually yes. Kegg is a one-time device purchase with no test strips or wands to rebuy, while Mira and Inito both require ongoing consumables. Compare the upfront device prices and your expected months of use; the longer you track, the more kegg's no-refill model pays off.
Can kegg confirm that I ovulated?
No. Kegg identifies the fertile window opening via cervical fluid trends. Confirming ovulation requires detecting the post-ovulation progesterone rise (PdG), which is what Mira and Inito measure. If ovulation confirmation is the point, kegg alone can't provide it.
Which is best for PCOS — Mira, Inito, or kegg?
Mira or Inito, generally. PCOS often involves elevated baseline LH and irregular cycles; quantitative hormone charts handle that better than any single-signal method. Cervical fluid patterns can also be less predictable with PCOS, making kegg's signal noisier. None of the three diagnoses anything — take the data to your doctor.
Can I combine kegg with ovulation strips?
Yes, and it's a popular pairing: kegg flags the window opening with zero daily cost, and a handful of cheap LH strips pinpoint the surge within it. That combo covers most of what a hormone monitor does for far less money — minus ovulation confirmation.
Pricing and product details reflect typical 2026 information at the time of writing and change often — always confirm current pricing, subscription terms, and return policies on the manufacturer's site before buying. This article is educational and is not medical advice.