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Free tools

Listing counters

These counters use the same character limits as the metadata editor. The count runs in your browser.

Counters

  • App Store title character counterCount an App Store title against the 30-character limit. Spaces count, and the count runs in your browser.
  • App Store subtitle character counterCount an App Store subtitle against the 30-character limit. Spaces count, and the count runs in your browser.
  • App Store keyword field counterCount the hidden 100-character App Store keyword field and flag spaces, empty commas, and duplicates.
  • Google Play title character counterCount a Google Play title against the 30-character limit. Spaces count, and the count runs in your browser.
  • Google Play short description counterCount a Google Play short description against the 80-character limit. The count runs in your browser.
  • Metadata checkerCheck an App Store title, subtitle, and keyword field together with a Google Play title and short description.
  • Store test calculatorHow many days a product page optimization test or a store listing experiment needs, and the smallest change your traffic can show. Runs in your browser.
RocketASO

Names one listing fix for the week, in dollars when the reports allow, then compares installs before and after it.

Product

  • Pricing
  • Public lookup
  • Audit a listing free

Company

  • Privacy policy
  • Terms of service
  • Refund policy
  • Security
  • Contact

Guides

  • How to do ASO: a weekly routine
  • Google Play ASO: what changes from the App Store
  • What an app's search rank really measures
  • ASO services, ASO software or doing it yourself: what each does and costs
  • App Store keywords: how to fill the keyword field
  • All guides

Comparisons

  • vs AppTweak
  • vs Sensor Tower
  • vs AppFollow
  • vs Mobile Action
  • vs Astro
  • vs RespectASO
  • vs Appfigures
  • vs Asodesk
  • vs AppRadar
  • vs TheTool
  • vs Sonar
  • vs ASO.dev
  • All comparisons

Alternatives

  • Best ASO tools in 2026
  • Best free ASO tools
  • Best ASO tools for the App Store and Google Play
  • All alternatives

Free tools

  • App Store title character counter
  • App Store subtitle character counter
  • App Store keyword field counter
  • Google Play title character counter
  • Google Play short description counter
  • Metadata checker
  • Store test calculator
  • All free tools

Glossary

  • App Store optimization
  • Search result conversion
  • App Store title
  • App Store subtitle
  • App Store keyword field
  • Google Play short description
  • Listing audit
  • Asking for ratings
  • All definitions

Diagnose

  • Search impressions are not becoming downloads
  • The keyword is in the metadata and the store is not showing the app
  • A rival changed their listing
  • All diagnoses