A straightforward leave-on moisturizer or serum can reach a stable prototype in 6–10 weeks, including initial formula development and basic stability screening. More complex projects — SPF products, color cosmetics requiring shade matching, or formulas targeting EU or China regulatory approval — commonly take 4–6 months. AJ Cosmo Labs lets you track each sample round and stability milestone inside the app so timelines stay visible.
Read the full guide on cosmetic chemist marketplace app for beauty founders →