
Formula Lab - Calc & Simulator
Custom Formula Calculator
Free · In-App Purchases · Designed for iPad
Build your own formulas with Formula Lab! Simulate anything from game damage to business forecasts.
Start in one tap with rich templates.
For those who demand more than just a simple calculation.
Formula Lab is a next-generation simulation tool that lets you build your own calculation models and instantly visualize complex "what-if" scenarios with countless variables.
◆ Start in One Tap with Templates
Includes a rich library of practical, professional templates like "Compound Interest," "Game Damage (Crit Avg.)," and "Loan Payments." Complex formulas become yours with a single selection. No need to start from scratch.
◆ Build & Grow Your Calculator at Your Fingertips
Freely create and edit your own unique formulas in a powerful editor that supports functions like max(0, {ATK} - {DEF}), min(), and floor(). Parameters can be written simply as {Variable Name}.
◆ Switch Scenarios Instantly with Presets
Save combinations of parameter values as named Presets like "Warrior Lv10" or "Bear Market Scenario." Instantly switch between situations from a dropdown menu to compare how results change.
◆ Discover the Optimal Solution with Dynamic Graphs
Simply choose a parameter for the X-axis to see how results change on a beautiful graph. As you move the sliders, the graph transforms in real-time. Better yet, you can overlay the before-and-after graphs to compare them, allowing you to intuitively find the perfect balance.
◆ Structure Your World with Entities
Individually manage groups of parameters (Entities) like "Player" and "Enemy," or "Product A" and "Product B." Handle complex interactions between entities, such as {Player:Attack} - {Enemy:Defense}, all within this single tool.
◆ Organize Your Thoughts by Reusing Formulas
A formula you create (e.g., Base Damage) can be called from another formula using {f:Base Damage}. Break down complex calculations into reusable components to keep your thoughts clear.
【Perfect for...】
● Gamers pursuing the ultimate build and theorycrafting in RPGs and simulation games.
● Individuals wanting to compare various scenarios for investments or loan repayment plans.
● Business professionals looking for an easy way to perform "What-if analysis" on their smartphone, as a handy alternative to Excel or spreadsheets.
● Students and researchers who want to interactively learn physics and chemistry formulas by adjusting variables.
Unleash your spirit of inquiry.
■ Subscription - Premium Plan
1-Month Plan
Enjoy an ad-free, unrestricted experience for one month.
■ About Auto-Renewable Subscriptions
Your subscription will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period.
■ How to Cancel
You can cancel your subscription by navigating to Settings > iTunes Store & App Store > Apple ID > View Apple ID > Subscriptions.
■ Restoring Purchases
If you have an active subscription, you can restore it via the "Restore Purchase" option.
■ Cancellation Policy
Cancellations can only be made through the method described above.
■ Privacy Policy
https://myappsintro.web.app/page/privacypolicy/
■ Terms of Use (EULA)
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
The developer, Yusuke Ishino, 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
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yusuke Ishino
- Size
- 51.7 MB
- Category
- Productivity
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium Plan USD 1.99
- Copyright
- ©2025 Yusuke Ishino