Free buyer tools: costs, engagement and retention calculations

Useful arithmetic, with no account access

These free tools run locally in your browser. They do not fetch your profile, contact suppliers, store targets, request passwords, create an order or change your balance. Enter observations yourself and use the result as a planning reference. The tools cannot verify authenticity, target visibility, platform eligibility or future performance.

Estimate a standard quantity-priced charge

Copy the current rate / 1K and limits from the exact listing. This formula is for a standard quantity-priced service only, not a fixed package or automatic-subscription quote. The live order form determines the final eligible charge.

Check a public target’s format

This checks the structure of a public HTTPS link for selected common platforms. It does not visit the link, check whether a post exists, or confirm the selected service accepts it. Use the target instructions from the exact listing. Never paste a password, API key, private invite, reset link or other secret.

Calculate an engagement rate from your observations

Enter a total interaction count and choose its denominator: followers or reached accounts. Formula: interactions ÷ denominator × 100. This is a user-selected arithmetic definition, not a platform-certified benchmark. Different analytics definitions cannot be compared directly. Purchased activity, repeat interactions and missing data can distort interpretation.

Calculate an observed net decrease

Enter a count recorded after completion and a later follow-up count. Formula: max(0, baseline − follow-up) ÷ baseline × 100. This is a net decrease in the total, not a verified drop rate for a specific order. New organic activity and overlapping orders can hide losses; if the total increased, zero observed decrease does not mean zero losses. This tool does not populate the service cards or create retention statistics.

Keep the result in context

• Missing data is not a zero input. If an observation is unavailable, do not produce a confident result.
• Do not enter private credentials into any tool. A public-format check needs only a public URL.
• Verify the exact service target, units and current pricing in the live listing before ordering.
• Use private Support for an account or fulfillment issue; these tools cannot authorize a refill or cancellation.

Questions before you choose