Free tools for app marketers

No sign-up. Everything runs in your browser.

• 30-Day 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — Generate a weekly social media content calendar for your app from your posting cadence, platforms and content pillars, then download it as a CSV.

Start your first batch with Otto — Your automated social media marketer.