Simple and Principia are thoughtful skincare brands offering reliable cleansers, toners, and moisturizers crafted with ingredients like niacinamide and glycerin. The British brand suits acne-prone skin and skin with dark spots best, featuring standout choices such as the Kind to Skin Soothing Facial Toner and the Micellar Cleansing Water, whereas the other brand focuses on balanced to oily skin with precise formulas like the Gel de Limpeza GL-01. Both help maintain a healthy complexion, though Simple uniquely addresses hyperpigmentation, aging signs, and barrier function.
Simple is a British skincare brand founded in 1960 and owned by Unilever PLC since 2011.
This page compares some of the most popular Simple and Principia products; for every product of both brands, with a fit score for your own skin, use the Lovi app.
Simple has a much broader range of products on this page and achieves High to Superior Lovi fit levels for sensitive skin and mature skin, whereas Principia offers only a single cleanser that rates no higher than Average.
What is the difference between Simple and Principia?
Simple offers a broad range of fragrance-free cleansers, moisturizers, and makeup removers that Lovi rates with High and Average fit levels for many skin types, whereas Principia features only a single cleanser on this page with Average to Caution fit levels. Niacinamide helps reduce skin pigmentation, and glycerin helps improve skin hydration.
Simple offers better-fitting facial cleansers for most skin types, with its Refreshing Facial Wash receiving an Average fit for sensitive and oily skin, whereas Principia's Gel de Limpeza GL-01 rates only Low or Caution for dry and sensitive skin. Glycerin helps maintain skin hydration in these cleansers.
Simple features budget-friendly moisturizers on this page, while pricing details for Principia are not available here.
Which causes fewer breakouts, Simple or Principia?
Simple products on this page have reviewers mentioning that they cause breakouts or irritations, while the single Principia product on this page does not have user feedback regarding breakouts.
Which brand has been on the market longer, Simple or Principia?
Simple has been on the market much longer, having been founded in the United Kingdom in 1960, whereas Principia was founded in 2020.
Do any products from either Simple or Principia contain fragrance?
Every product on this page from both Simple and Principia lists no fragrance in its ingredients.
What are the key ingredients featured across Simple skincare products?
The products on this page for Simple feature key ingredients like niacinamide and glycerin. Niacinamide helps reduce cutaneous pigmentation and controls skin aging, while glycerin aids in providing hydration and improving skin barrier function.
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Behind this comparison
Lovi compares products by their fit scores, calculated from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.
