Buy the La Roche-Posay Anthelios Ultra Light Fluid Sunscreen.

It blocks more sun, survives sweat, and costs a quarter as much per mL, the glow is nice but it is not sunscreen's job.

What was compared

1. Real protection when the sun is strong
LRP hits SPF 60 broad spectrum, Glowscreen only SPF 40. Both matter for daily wear, but on long outdoor days, hikes, beach trips, that extra UVB blocking is real and Glowscreen simply doesn't have it.
2. Keeps working after you sweat or swim
LRP is rated water resistant for 80 minutes, stated right on the label. Glowscreen's page makes no such claim, it's built as a primer first and sunscreen second. Push through a workout or swim and Glowscreen gives up first.
3. Won't clog pores if you're oily or acne-prone
LRP is explicitly oil-free and non-comedogenic, built for normal to oily skin. Glowscreen's dewy glow is made for drier skin craving radiance, and on oily or acne-prone skin that same glow just reads as shine. Unless that's your skin type wanting the look, LRP fits more faces.
4. Four times the sunscreen for your dollar
LRP's $28 covers 1.7oz (50mL), about $0.56 per mL. Supergoop's $48 covers 20mL, about $2.40 per mL, over four times the cost for lower SPF. That's real money spent on tint and glow, not sun defense.
5. Yes it doubles as a glow primer. Skip it anyway.
Glowscreen's dewy tint doubling as a primer is a genuine reason people love it, and if you want that sunkissed no-makeup look, buy it, plenty do. But as a sunscreen it's pricier, less water resistant, and lower SPF, and that's the job you're actually buying it for.