Compare Nail Polish
Which scores higher on safety? R3 breaks it down.
R3 scored the Ella + Mila Professional Nail Polish (17-Free) 9.8/10 and the OPI Nature Strong Nail Polish 9.8/10 on the same nail polish scoring system, weighing safety, efficacy, and usability. The overall scores are close; the pillar breakdown below shows where they differ.
The most important dimensions, side by side.
See which one actually scores higher — and why
Free account unlocks full safety scores, spec-by-spec breakdown, and the R3 verdict on Ella + Mila Professional Nail Polish (17-Free) vs OPI Nature Strong Nail Polish.
Unlock the full Ella + Mila Professional Nail Polish (17-Free) vs OPI Nature Strong Nail Polish breakdown
Free account unlocks all safety scores, complete spec comparison, scoring rationale, and the R3 verdict on which one to buy.
Everything you need to make the call - who each one is for, and who should skip it.
Go for it if you...
You are pregnant or nursing and want the safest possible nail color
You want a clean claim you can actually verify against a published ingredient list
You specifically want to avoid hidden benzophenone, TPHP, and formaldehyde resin
You want a polish that air-dries in a few minutes without a UV or LED lamp
You are happy paying around eleven dollars for a mainstream-priced clean polish
You want a clean polish from a widely available mainstream brand that publishes a checkable ingredient list
You specifically want to avoid benzophenone UV filters, since this formula contains none
You want color you can paint and wear in minutes without a UV or LED lamp
You are happy with about a week of wear from a natural-origin lacquer at a normal price
The main thing to know
The brand does not publish chip-free wear days or coverage, so longevity is unverified. If multi-day wear is a dealbreaker, look for an editorial wear test first.
This is a regular nail polish, not a long-wear system. OPI puts chip-free wear at about a week, so if you need color that survives two weeks of daily wear, a gel is the better choice.
Skip this if you...
You need a documented, multi-day chip-free wear claim before you buy
You want detailed coverage and brush information up front
You are looking for the cheapest drugstore polish regardless of ingredients
You need two-plus weeks of chip-free wear and are willing to use a gel and lamp system to get it
You require a fully vegan formula, since OPI states Nature Strong is not 100% vegan
You want a tested, third-party wear figure rather than the brand's own week estimate
Neither of these quite what you're looking for?
I've reviewed all Nail Polish options at every price pointEvery Nail Polish in our database is scored using R3's deterministic scoring system - the same inputs always produce the same score. For this comparison, we evaluated Ella + Mila and OPI across 3 independent criteria: Safety (98%), Efficacy (1%), Usability (1%). No sponsored rankings. No paid placements.
Straight answers - no sponsored content, no filler.
Both scored close to 9.8/10, so the better choice depends on your priorities. Safety is our top-weighted scoring pillar, followed by efficacy, and usability. Check which pillar matters most to your family and compare those specific scores.
R3 uses a deterministic scoring system - the same inputs always produce the same score. We evaluate each Nail Polish across Safety, Efficacy, Usability using independently verified data. No sponsored rankings. No paid placements. Every score is fully reproducible.
Not necessarily. The overall score reflects how we weight those three pillars, but your priorities may differ. If you care most about safety, compare the safety scores directly. If budget drives your decision, the prices tell a clearer story. The "right" pick is the one that matches what matters most to your family.
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