You asked:
Can you recommend an app-controlled vibrator suitable for both clitoral and G-spot stimulation at a wedding, with a preference for strong vibrations?
Grace:
If you can choose a favourite between clitoral and G-spot stimulation, you'll be better off. As while dual-stimulation options do exist within the wearable toy space, such as the Lovense Dolce, they tend to be a lot more likely to slip out.
My suggestion would be to get yourself a Lovense Lush 4. Whilst it only offers G-spot vibrations, it has a tail which will offer some residual vibrations to your clitoris. This toy is also very powerful, but because it is internal-only the noise level remains low, making it perfect for a wedding. Plus, Lovense have the best app on the market.
If you tend to prefer clitoral toys, however, then I would go with the We-Vibe Moxie+. This attaches to your underwear by placing a magnet on the other side of it. While it is also app-controllable, a big advantage here is that this toy comes with a physical remote too. And if you have a real need to be discreet, for instance if you're in the bridal party or are attending with close friends or family, this may be the better option as a small remote that can be controlled from within a pocket is a lot less obvious than you or a partner using the app on a phone.