# Free tools

- [30-Day TikTok Content Plan Generator](https://www.ottosocial.ai/resources/tools/tiktok-content-plan-generator): Get a free, personalized 30-day TikTok and Instagram Reels plan for your app: a format, hook, angle and call to action for every posting day. Download as CSV.
- [TikTok Hook Generator](https://www.ottosocial.ai/resources/tools/tiktok-hook-generator): Generate scroll-stopping TikTok and Instagram Reels hooks for your app in seconds. Pick a hook type, enter your app and audience, and copy the results.
- [Social Caption & Hashtag Generator](https://www.ottosocial.ai/resources/tools/social-caption-generator): Create TikTok and Instagram captions with a benefit-led first line, a call to action and relevant hashtags for your app. Free, instant, no sign-up.
- [UGC Script Generator](https://www.ottosocial.ai/resources/tools/ugc-script-generator): Draft a 15 to 20 second UGC-style video script for your app with hook, problem, reveal, steps, payoff and CTA. Free beat-structured template, no sign-up.
- [Engagement Rate Calculator](https://www.ottosocial.ai/resources/tools/engagement-rate-calculator): Calculate engagement rate by followers or by views from likes, comments, shares and saves. Free calculator for TikTok, Instagram Reels and YouTube Shorts.
- [Social Media Video & Image Size Guide](https://www.ottosocial.ai/resources/tools/social-media-size-guide): Quick reference for TikTok, Instagram Reels, Stories, feed and YouTube Shorts sizes, aspect ratios, and safe zones. Copy the exact pixel dimensions.
- [UTM Link Builder](https://www.ottosocial.ai/resources/tools/utm-link-builder): Build UTM-tagged links for TikTok, Instagram and other campaigns in one click. Consistent naming, instant output, free and private in your browser.
- [App ROAS, LTV & CAC Calculator](https://www.ottosocial.ai/resources/tools/app-roas-ltv-calculator): Calculate CPI, CAC, LTV, ROAS, LTV:CAC and payback period for your app from ad spend, installs and conversion rate. Free and instant.
- [Social Media Character Counter](https://www.ottosocial.ai/resources/tools/character-counter): Count characters, words and hashtags for TikTok, Instagram, X, YouTube Shorts and LinkedIn captions and see how close you are to each platform limit.
- [Content Calendar Planner](https://www.ottosocial.ai/resources/tools/content-calendar-planner): Generate a weekly social media content calendar for your app from your posting cadence, platforms and content pillars, then download it as a CSV.