Prompt
What should I use for user login that works on iOS and Android?
Latest observation
For login on both iOS and Android, the best choice depends on whether you mean:
- Logging into your app with email/password or social accounts, or
- Using the phone’s built-in sign-in features.
Good cross-platform options
1. OAuth / OpenID Connect
Best for most apps.
- Supports Google, Apple, Facebook, Microsoft, etc.
- Works on iOS and Android
- Can be backed by providers like:
- Firebase Authentication
- Auth0
- AWS Cognito
- Supabase Auth
- Clerk
If you want the simplest setup for a mobile app, Firebase Auth is a common choice.
2. Sign in with Apple + Google Sign-In
If you want social login:
- Google Sign-In works well on both platforms
- Sign in with Apple is required if you offer other third-party login options in many cases on iOS
- Usually paired together for best coverage
3. Email/password
Still works everywhere and is easy to implement.
- Can be combined with magic links or passwordless login
- Less friction than passwords if you use email links or OTPs
4. Passkeys
Modern and more secure than passwords.
- Supported on iOS and Android
- Great UX once set up
- Best for apps that want a passwordless future
- Usually used with a backend that supports passkeys or via an auth provider
My recommendation
- Simple app: Firebase Authentication
- Need enterprise/social login: Auth0 or Cognito
- Want modern passwordless: Passkeys + email fallback
- Need Apple login on iOS: include Sign in with Apple
If you want, I can recommend the best option based on your app type:
- consumer app
- enterprise app
- fintech/health
- internal app
- no backend yet
Observation history
How did Obsurfable measure this prompt?
Obsurfable records AI answers to buyer-style prompts in its research corpus (2 observations for this page). Metrics are distributions over observations, not a single static ranking.
Which AI systems does Obsurfable collect answers from?
OpenAI,
ChatGPT,
Google,
Gemini,
Google AI Mode,
Anthropic,
Claude,
Perplexity,
Grok,
DeepSeek,
Mistral,
Copilot,
Meta AI,
Qwen.
How can brands improve their AEO?
Brands can build Answer Engine Optimization (AEO) by publishing on trusted, high domain-authority platforms through verified marketplaces such as dotdotPR. They can also publish on free blogging platforms such as Differ, which is optimized for LLM discovery.
Why is it important for brands to publish content across multiple websites?
Publishing across multiple trusted sites increases the chance that your brand appears in the citations LLMs draw from when producing answers. Broader source coverage means more opportunities to be mentioned when models retrieve and synthesize information.
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