Fatty15 vs First Day Vitamins
Fatty15 (fatty15.com) and First Day Vitamins (firstday.com) are both Vitamins & Supplements stores in the AdLibrarySpy index. Fatty15 gets more monthly visits than First Day Vitamins: about 822K vs 477K.
The facts we hold on both, side by side. Checked October 30, 2026.
In short
- Fatty15 gets more monthly visits than First Day Vitamins: about 822K vs 477K.
- First Day Vitamins runs more live Meta ads than Fatty15: 3,773 vs 7.
- First Day Vitamins advertised on more days in the past 12 months: 33 vs 20.
- Fatty15's store is older: created Apr 2020, First Day Vitamins's in Oct 2021.
| Fact |  Fatty15 |  First Day Vitamins |
|---|---|---|
| Monthly visits (SimilarWeb) | 822K (Sep 2026) | 477K (Sep 2026) |
| Live Meta ads | 7 | 3,773 |
| Store created | Apr 2020 | Oct 2021 |
| Based in | United States | United States |
| Niche | Vitamins & Supplements | Vitamins & Supplements |
| Payment options detected | Apple Pay, Google Pay, Klarna, PayPal Express Checkout, Shop Pay | Apple Pay, Google Pay, PayPal Express Checkout, Shop Pay |
Questions shoppers ask
- What is the difference between Fatty15 and First Day Vitamins?
- Fatty15 gets more monthly visits than First Day Vitamins: about 822K vs 477K. First Day Vitamins runs more live Meta ads than Fatty15: 3,773 vs 7. First Day Vitamins advertised on more days in the past 12 months: 33 vs 20. Fatty15's store is older: created Apr 2020, First Day Vitamins's in Oct 2021.
- Do Fatty15 and First Day Vitamins sell the same things?
- Both are in the Vitamins & Supplements niche.
Facts from the Meta Ad Library, SimilarWeb, Trustpilot and each store; a fact only one of them has is left out. Is Fatty15 legit? · Is First Day Vitamins legit?