Free texting limited to US/Canada; ads may be intrusive

• Contact Organization by Interest: Ability to tag, label, or segment contacts based on their interests.
• Automation: Automated responses, welcome messages, or drip campaigns.
• Two-Way Texting: To engage in conversations with respondents.
• Affordability: Free tier or low-cost options.

The search results include several mass texting and automated messaging services. However, not all are free, and some focus more on broadcasting than organizing contacts by interest. Here are the most relevant options based on your criteria:

1. Text-Em-All ():

   • Features: Primarily for mass texting and automated calls, with two-way texting for engagement. However, it emphasizes broadcasting over contact organization by interest.
   • Automation: Supports automated voice and text broadcasts, but no mention of interest-based segmentation.
   • Pricing: Free trial available, but no detailed pricing in the snippets. Likely paid for full features.
   • Fit: Limited for organizing contacts by interest, but good for broadcasting.

2. DialMyCalls ():

   • Features: Mass texting, automated calls, and two-way SMS. Allows contact management and segmentation via keywords for opt-ins.
   • Automation: Supports automated text messages, drip campaigns, and reminders.
   • Pricing: Free account with limited usage (e.g., 25 contacts once per week). Paid plans for more.
   • Fit: Decent for organization via keywords and groups. Free tier available.

3. Textedly ():

   • Features: SMS marketing with contact segmentation, tags, and two-way conversations.
   • Automation: Auto-responders, drip campaigns, and scheduled messages.
   • Pricing: Free trial, but paid plans (pricing not detailed in snippets).
   • Fit: Good for interest-based organization and automation.

4. SimpleTexting ():

   • Features: Contact segmentation, two-way texting, and automation tools (e.g., welcome messages, behavior-based texts).
   • Automation: Automated texts based on triggers, API access for custom workflows.
   • Pricing: Free trial available; paid plans likely.
   • Fit: Strong for organization and automation, with a user-friendly platform.

5. Textmagic ():

   • Features: SMS campaigns, two-way texting, and contact management with segmentation.
   • Automation: Automated opt-out management, scheduled texts, and AI-driven replies.
   • Pricing: Pay-as-you-go (e.g., $0.049 per SMS), with a free trial.
   • Fit: Good for automation and organization, but may be costlier for high volume.

6. Omnisend ():

   • Features: E-commerce-focused automated texts, segmentation by behavior, and drip campaigns.
   • Automation: Strong automation workflows (e.g., abandoned cart messages).
   • Pricing: Free plan limited to 500 contacts; paid plans for more.
   • Fit: Excellent for automation and interest-based segmentation, especially for e-commerce.

1. Use Keywords for Opt-Ins:

   • Assign keywords for each interest (e.g., "MUSIC" for music lovers). When someone texts this keyword to your number, they are automatically added to a corresponding group .
   • Tools like DialMyCalls and SimpleTexting support keyword-based opt-ins.

2. Segment Contacts:

   • In Omnisend or Textedly, create segments based on interests (e.g., tags like "Interest: Tech"). Automate messages to these segments .

3. Automate Responses:

   • Set up auto-replies for specific keywords. For example, if someone texts "HELP", send a predefined response with options .
   • Use drip campaigns for ongoing engagement (e.g., weekly updates for each interest group).

4. External Tools for Free Options:

   • If free apps lack built-in organization, use a spreadsheet to track interests and manually manage groups. Combine with a free app like TextFree or TextMe (from previous context) for texting, but automation will be limited.

• Cost: Free tiers often have limits (e.g., Omnisend free plan caps at 500 contacts; DialMyCalls limits message volume). For larger audiences, paid plans are needed.
• Compliance: Ensure you have opt-in consent for automated texts to avoid legal issues (TCPA regulations) .
• Emergency Use: These are not for emergency hotlines; they lack support for critical situations.

For a free automated hotline with interest organization:

• Start with Omnisend if you have under 500 contacts—it offers the best automation and segmentation for free .
• Try DialMyCalls for a very small-scale free option (25 contacts/week) and use keywords for interest groups .
• Use SimpleTexting or Textedly for their free trials to test automation features.

If your needs grow, consider paid plans for higher limits. Always check the latest pricing and terms on their websites, as details may change.

Based on your need for an Android app that functions as a texting-based hotline with automation and the ability to organize contacts by interest, I've analyzed the search results. Here are the best options, focusing on free or freemium apps available on Android:

1. Use Keywords for Interest Opt-Ins:
   • Apps like DialMyCalls and TextSpot support keyword opt-ins. For example, users text "TECH" to join a tech interest group. The app can auto-reply with info and add them to a segment.
2. Create Contact Groups:
   • Auto Text and Hit Em Up allow you to create groups (e.g., "Interest: Music"). Use these groups to send targeted bulk messages.
3. Leverage Smart Selectors:
   • Hit Em Up lets you filter contacts by criteria (e.g., area code, company) to create dynamic groups based on metadata.
4. Set Up Auto-Replies by Interest:
   • SMS Auto-Reply and Pulse SMS allow custom auto-replies for specific contacts or triggers. For example, if a user texts "INFO," auto-reply with details and tag them as "Info-Seeker."
5. Integrate with External Tools:
   • TextSpot integrates with Zapier, enabling advanced workflows. For instance, when a user texts a keyword, Zapier can add them to a Google Sheet sorted by interest.

• Permissions: Apps like Auto Text require SMS, Call Log, and Accessibility permissions to automate messages fully. Review privacy policies.
• Reliability: Some apps (e.g., Auto Text ) have user reports of failed messages. Test thoroughly before relying on critical communications.
• Free Limits: Free tiers often have restrictions (e.g., DialMyCalls limits to 25 messages/week ; Pulse SMS has ad-supported limits ).
• Keyword Automation: Advanced keyword-based auto-replies may require paid upgrades (e.g., SMS Auto-Reply pro subscription ).

For your Android hotline app:

• Start with DialMyCalls if you need a free, simple solution with keyword opt-ins to organize interests .
• Try Auto Text if you need robust scheduling + auto-replies + contact groups .
• Consider Hit Em Up for smart contact filtering based on criteria like location or company .

For true automation (e.g., keyword-triggered interest sorting), TextSpot with Zapier or a paid tool like SimpleTexting (not in results but mentioned in prior context) may be needed beyond basic apps.

Always test with a small group first to ensure reliability and check for Android version compatibility.