Percent-O

Numerical Reasoning & Aptitude

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Numerical Reasoning: Master the Math Behind the Interview. Infinite, realistic practice with percentages, ratios & currency.  Spot traps & get ranked. Master the data interpretation skills needed for corporate aptitude tests. Percent-O provides infinite, realistic practice for numerical reasoning exams. Infinite Practice Procedurally generated exam sessions ensure you never see the same question twice. Memorization won't work; you must master the logic. Realistic Data Analyze complex tables including Revenue, Headcount, and Exchange Rates under strict time limits. Trap Training Learn to identify specific "distractor" answers designed to trick you, including: Denominator Errors: Using the wrong base year. Unit Errors: Missing the "thousands" multiplier. Data Sufficiency: Recognizing when an answer "Cannot be calculated." Professional Scoring Receive a Stanine Score (1–9) and a breakdown of your accuracy and speed, matching the grading standards used by employers.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, Marc Picco, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Location
    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Marc Picco
Size
  • 7.1 MB
Category
  • Education
Compatibility
Requires iOS 26.1 or later.
  • iPhone
    Requires iOS 26.1 or later.
  • iPad
    Requires iPadOS 26.1 or later.
  • Mac
    Requires macOS 26.1 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.1 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2025 Marc Picco
  • Privacy Policy

    • More by Marc Picco

    You Might Also Like