Sinium SEO Tools is a collection of 50+ SEO tools to enable developers with one of the most powerful search engine optimization apps you will find in the market today. The app is completely FREE to use, the Ads can be removed for a small fee. 50+ tools included: seo ranking tools. 1. Alexa Rank. 2. MozRank. 3. Page Authority. 4. Google SERP Keyword Position.