Valuing a startup at the pre-seed stage, especially for a community app like yours, can be challenging due to the lack of substantial financial data and the early stage of user growth. Here are some steps and guidelines to help you with valuation and investment decisions:

### 1. Valuation Range
The valuation of a pre-seed startup can vary widely based on several factors including the market potential, the strength of the founding team, the product’s uniqueness, and early traction. Given your current traction (300 iOS users and 1000 on the waiting list), a reasonable valuation might fall between $1 million to $3 million. Here’s a breakdown:
- **Market Size**: The larger the potential market, the higher the valuation.
- **Team Strength**: Experienced founders with relevant backgrounds can boost valuation.
- **Traction**: Early user numbers and growth rates are critical.
- **Product Stage**: Having a live product on iOS and development on Android is positive.

### 2. Equity for $50K Investment
For a $50K investment at a valuation range of $1 million to $3 million:
- **At $1M Valuation**: $50K would represent 5% equity.
- **At $2M Valuation**: $50K would represent 2.5% equity.
- **At $3M Valuation**: $50K would represent ~1.67% equity.

### 3. Should You Raise Investments Now?
Consider raising funds if:
- **You Need Capital**: For scaling, marketing, or completing Android development.
- **Investor Expertise**: If the angel investors can provide strategic value beyond money (mentorship, connections, industry knowledge).

**Risks of Raising Now**:
- **Equity Dilution**: Giving up equity early can dilute your ownership, impacting future funding rounds.
- **Premature Scaling**: Raising funds too early can lead to premature scaling before achieving product-market fit.

**Benefits of Waiting**:
- **Better Valuation Later**: With more users and clearer traction, you could command a higher valuation.
- **Ownership Retention**: Retain more equity by delaying funding until necessary.

### Detailed Steps
1. **Prepare Your Pitch**: Highlight your traction, the problem you’re solving, and your growth plans.
2. **Determine Milestones**: Set clear milestones that justify the valuation (e.g., user growth targets, Android launch).
3. **Negotiate Smartly**: Focus on finding investors who offer more than just money.

### Example Calculation
If you decide on a $2M valuation and raise $50K:
- Post-Money Valuation: $2,050,000
- Equity Given: $50K / $2,050,000 ≈ 2.44%

### Recommendations
- **Validate Interest**: See how your app performs post-Android launch before committing to investments.
- **Angel Investors’ Value**: Choose angels who offer strategic value beyond capital.

Would you like more detailed financial modeling or assistance with preparing your pitch deck for investors?