# Learn Polymer.js Offline vs Learn Bootstrap CSS Offline

The clearest difference is price: Learn Polymer.js Offline at $1.99 against Learn Bootstrap CSS Offline's $2.99. Learn Polymer.js Offline also leads on iOS requirement (13.0 vs 17). On update cadence, ads, in-app purchases and device support there is nothing between them.

Learn Polymer.js Offline costs $1.99 and Learn Bootstrap CSS Offline $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Polymer.js Offline ships an update every 21 months, Learn Bootstrap CSS Offline every 14 months. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Learn Polymer.js Offline | Learn Bootstrap CSS Offline |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 14 months** |
| Size | 38 MB | 177 MB |
| Requires iOS | **13.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Muhammad Mubeen](https://appshunter.io/developer/1553722821) | [Shahbaz Khan](https://appshunter.io/developer/1479963383) |

## What reviewers say

### Learn Polymer.js Offline

[App page](https://appshunter.io/ios/app/learn-polymerjs-offline/id6466240900)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Learn Bootstrap CSS Offline

[App page](https://appshunter.io/ios/app/learn-bootstrap-css-offline/id6480582193)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Learn Polymer.js Offline free?

Learn Polymer.js Offline costs $1.99, with no in-app purchases.

### Is Learn Bootstrap CSS Offline free?

Learn Bootstrap CSS Offline costs $2.99, with no in-app purchases.

### Do Learn Polymer.js Offline or Learn Bootstrap CSS Offline have ads?

Neither Learn Polymer.js Offline nor Learn Bootstrap CSS Offline shows ads.

### Which is updated more often, Learn Polymer.js Offline or Learn Bootstrap CSS Offline?

Learn Polymer.js Offline ships an update every 21 months, and Learn Bootstrap CSS Offline every 14 months. Most recently, Learn Polymer.js Offline was updated on November 11, 2026 and Learn Bootstrap CSS Offline on November 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*