# BoBo Calculate — Triangle Solver & Visualizer

> Triangle Solver & Visualizer (iPhone/iPad app by 瑞庆 王.)

- Source: https://appshunter.io/ios/app/bobo-calculate/id6808910018 (this page in markdown: same URL + `.md`)
- Developer: [瑞庆 王](https://appshunter.io/developer/1854269704)
- Category: Utilities, Graphics & Design
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: Chinese (Simplified, China)
- Released: 2026-09-21
- Data updated: 2026-09-25
- User reviews in markdown: https://appshunter.io/ios/app/bobo-calculate/id6808910018/reviews.md

## What is BoBo Calculate?

Bobo Geometry Workshop makes triangle calculations clear, visual, and practical.

Enter any three known sides or angles to solve a triangle in seconds. Whether you are studying geometry, checking your work, building stairs, or planning a cut, every result is easy to understand and verify.

【Complete Triangle Solver】

Supports SSS, SAS, SSA, ASA, AAS, and AAA combinations. When an SSA problem has two valid solutions, both are shown.
Results include:

• All sides and angles
• Triangle classification
• Area, perimeter, and semiperimeter
• Three altitudes
• Inradius and circumradius
• Degree and radian modes  

【Visual Diagrams and Clear Steps】

Triangles are drawn to the calculated side proportions. You can also display altitudes, medians, angle bisectors, incircles, circumcircles, and triangle centers.

Detailed formulas and substituted values show how each answer was calculated, making results easier to learn from and verify.

【Practical Tools】

Built-in calculators help with common measurement tasks:

• Stair dimensions
• Wood lengths and miter angles
• Pipe offsets
• Slopes and elevation changes
• Brace lengths  

【Save and Share】

• Keep recent calculations on your device
• Reload previous values and continue calculating
• Export results as images
• Copy and share calculation results
• Customize tool order and text size
• Switch between Simplified Chinese and English  

The triangle calculator is free to use. An optional subscription unlocks the stairs, wood, pipe, slope, and brace calculators.

Calculation inputs, results, and history are processed and stored locally on your device and are not uploaded to a developer server.

Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| BoBo VIP – Monthly Subscription | $0.99 | per month |



## Version history (last 1 release)

### 1.0 — 2026-09-22

No release notes.

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## More apps by 瑞庆 王

- [CheckInDuck - Daily Habit](https://appshunter.io/ios/app/checkinduck-daily-habit/id6760517368)

All apps by 瑞庆 王: https://appshunter.io/developer/1854269704

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-25.*