# Sapphirus LearningChain vs PDK Academy

The clearest difference is iOS requirement: Sapphirus LearningChain at 12.0 against PDK Academy's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sapphirus LearningChain ships an update every 3 months, PDK Academy every 2 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Sapphirus LearningChain | PDK Academy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sapphirus-learningchain/id6451921662/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 25 MB | 92 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sapphirus Systems Pvt Ltd](https://appshunter.io/developer/1698669375) | [Anuj Gupta](https://appshunter.io/developer/1651060633) |

## What reviewers say

### Sapphirus LearningChain

[App page](https://appshunter.io/ios/app/sapphirus-learningchain/id6451921662)

This app allows students to securely store their blockchain-based digital certificates in a personal wallet. Certificates can be easily shared on social networks or sent for verification using a simple QR code scan.

**Highlights:** Blockchain digital certificate storage, Personal certificate wallet, Social network sharing, Verification certificate sharing, QR code scanning for storage

**Features:** macOS Compatibility

**In-app purchases:** none


### PDK Academy

[App page](https://appshunter.io/ios/app/pdk-academy/id6746629795)

**In-app purchases:** none


## Frequently asked questions

### Is Sapphirus LearningChain free?

Sapphirus LearningChain is free to download, with no in-app purchases.

### Is PDK Academy free?

PDK Academy is free to download, with no in-app purchases.

### Do Sapphirus LearningChain or PDK Academy have ads?

Neither Sapphirus LearningChain nor PDK Academy shows ads.

### Which is updated more often, Sapphirus LearningChain or PDK Academy?

Sapphirus LearningChain ships an update every 3 months, and PDK Academy every 2 months. Most recently, Sapphirus LearningChain was updated on October 16, 2026 and PDK Academy on October 11, 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.*