# Geometry Stash

> Portable geometry reference and custom slide creation tool. (iPhone/iPad app by Anson Liu.)

- Source: https://appshunter.io/ios/app/geometry-stash/id324651852 (this page in markdown: same URL + `.md`)
- Developer: [Anson Liu](https://appshunter.io/developer/1024660369)
- Category: Education, Reference
- Price: Free
- Rating: 4.73/5 from 11 App Store ratings · 54 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 3 MB
- Languages: English
- Released: 2009-07-31
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/geometry-stash/id324651852/reviews.md

## What is Geometry Stash?

Reviewing geometry on the go has never been easier. Just swipe to a term to view its description and diagram! 

"Instead of paging through their textbook for the theorems, now students can use this app" 
-Wired

"Geometry Stash is truly ideal for anyone needing a quick reference guide for geometric theories" 
-SlapApp

Which theorem completes the proof? Refresh your knowledge of the most commonly used theorems, postulates, and corollaries with Geometry Stash. Swipe to a term to check it out! 

Make your own slides to share with others using a built in editor. Write custom slides with drawing commands with instant preview. 

Share slides in a snap — Airdrop, iCloud, Message, Mail, and more! Your creations will be rendered as vector graphics that retain their crisp and sharp edges no matter what device others and you use!

Additional Features:

• Custom slide creation: Write your own slides through drawing commands in JSON, a lightweight data-interchange format. Edit on your device, computer, anywhere. 

• iOS Spotlight Search: Find your slides using iOS Search.

• Slide Over and Split View: View slides alongside other study material.

• iCloud Drive: Access created slides on all your devices. Write on the computer and view on the go.

• Portability: Export slides as JSON, Image file, or Text.

• Guided Access: Limit editing slide functionality to keep learners on track. 

• Bulk Import: Distribute multiple custom slides using a single bulk import file. Ideal for educators and administrators!

What others have said about Geometry Stash:

"Geometry Stash Offers Comprehensive Mathematical Guide" - The iPhone App Review

"My pick for Geometry Stash in terms of what to use it for is actually studying for exams. It certainly beats the flash card system I used for my SATs" - AppBite

"Don't let your Math assignments get you down when you have Geometry Stash to help you through" - CooliPhoneApps.com

"[Mirroring] would be great in a classroom or for a group study session" - EDUInReview

## Key features

- Geometry theorem reference
- Diagrams for geometric terms
- Custom slide creation editor
- Vector graphic slide export
- iOS Spotlight Search integration
- Slide Over and Split View support
- Bulk slide import for educators

## Recent user reviews (10 of 54)

All indexed reviews: https://appshunter.io/ios/app/geometry-stash/id324651852/reviews.md

### 5/5 — Such a great app!

*2017-11-30, version 2.0.4*

Bought the app a while back and am thrilled about being updated and works on all my new devices. Thanks so much!

### 5/5 — Excellent

*2016-09-08, version 2.0.4*

It comes handy and very useful!

### 5/5 — Brilliant

*2015-11-15, version 2.0.4*

Brilliant app for when you need to take a mandatory geometry course. It’s very intricate, quick to load and has loads of education value. The design is a little simple but I rather like that. There are also a lot of ways to export and edit certain slides.

### 5/5 — Good

*2015-10-14, version 2.0.4*

With this app you will have all geometry rules at your fingertips when you need them! Very useful for my purpose

### 5/5 — Nice

*2015-09-23, version 2.0.4*

I use this a lot. Every time I go to Uni. Quick navigation with the most common formulas. Love it

### 4/5 — Good educational app

*2015-09-11, version 2.0.3*

This app is great for parents to put on their kids phones. It's super easy to use and can help with any type of geometry questions out there !

### 4/5 — good

*2015-09-05, version 2.0.3*

Not bad for an math educational app, but still not that much powerful as I expected. Anyway, quite like its clean and intuitive UI design, looking forward to more detailed illustration been added for those geometric theories in the later updates.

### 4/5 — Helpful

*2015-09-04, version 2.0.3*

This app is a good tool for education. The student can learn a lot . It worth the money.

### 5/5 — Very helpful!

*2015-08-05, version 2.0.1*

I find this app very useful for reviewing triangle rules for the SAT!

### 5/5 — Great updates and content

*2015-08-05, version 2.0.1*

I love how this app keeps getting updated with new features and content.

## Frequently asked questions about Geometry Stash

### What does Geometry Stash do?

Geometry Stash provides a portable reference for geometry theorems, postulates, and corollaries, complete with descriptions and diagrams. It also features a built-in editor for creating and sharing custom geometry slides.

### What are the key features of Geometry Stash?

Key features include a comprehensive geometry term reference with diagrams, a custom slide editor that allows for drawing commands and instant previews, and the ability to share slides as vector graphics via various methods. It also supports iOS Spotlight Search, Slide Over, Split View, and iCloud Drive for seamless access across devices.

### Is Geometry Stash free to use?

Yes, Geometry Stash is a free application. The provided data indicates no in-app purchases or advertisements, suggesting it is entirely free for users.

### What devices is Geometry Stash compatible with?

Geometry Stash is designed for iOS devices, as indicated by features like iOS Spotlight Search, Slide Over, and Split View. It leverages iCloud Drive for cross-device access, allowing you to write on a computer and view on your mobile device.

### How can educators use Geometry Stash?

Educators can utilize Geometry Stash for its custom slide creation capabilities, allowing them to build tailored lessons. The bulk import feature is particularly useful for distributing multiple custom slides efficiently to students or administrators.

## Version history (last 5 releases)

### 2.0.7 — 2026-05-18

Move the bottom toolbar above the Home Screen indicator swipe zone.

### 2.0.6 — 2026-05-17

Moved the drawing view to the left in landscape mode so it is not obscured by the camera island.

### 2.0.5 — 2026-05-10

Geometry Stash is back!
Updated for compatibility with iOS 15-26.

### 2.0.4 — 2015-09-16

This app has been updated by Apple to display the Apple Watch app icon.

• Added iOS Spotlight Search integration
  ○ Geometry definitions and slides can now be found through iOS Spotlight Search.
  ○ Slide Over and Split View support added; view slides alongside another app!

### 2.0.3 — 2015-08-19

• You can now set a custom slide drawing size with the new keys
  ○ canvasWidth
  ○ canvasHeight

• Disabled auto-correction when editing slides.

• Fixed problems when editing at the end of slide files.

## Apps similar to Geometry Stash

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Geometry ®](https://appshunter.io/ios/app/geometry/id434132502) | 4.6 (224) | Free | Education |
| [Geometry Formulary](https://appshunter.io/ios/app/geometry-formulary/id6475582910) | — | Free | Education |
| [Geometry-Solver](https://appshunter.io/ios/app/geometry-solver/id1618839152) | — | Free | Education |
| [Geometry Calculator lite](https://appshunter.io/ios/app/geometry-calculator-lite/id1579330072) | 4.5 (77) | Free | Education |
| [Geometry Solver - Geometry AI](https://appshunter.io/ios/app/geometry-solver-geometry-ai/id6736373741) | 4.2 (71) | Free | Education |
| [Math Interactive](https://appshunter.io/ios/app/math-interactive/id1169802338) | 4.6 (726) | Free | Education |

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All apps by Anson Liu: https://appshunter.io/developer/1024660369

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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 2026-08-21.*