# AlgoCards vs System Design Refresher

The clearest difference is ads: System Design Refresher at none against AlgoCards's shown. AlgoCards's advantage is update cadence (every 9 days vs monthly) and iOS requirement (15.6 vs 26.2). On price, in-app purchases and device support there is nothing between them.

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

AlgoCards ships an update every 9 days, System Design Refresher monthly. The most recent releases landed on September 24, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | AlgoCards | System Design Refresher |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Monthly |
| Size | 61 MB | 18 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ryan Hamby](https://appshunter.io/developer/1847365372) | [Saurabh Sharma](https://appshunter.io/developer/1883599017) |

## What reviewers say

### AlgoCards

[App page](https://appshunter.io/ios/app/algocards-code-interview-prep/id6754247227)

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

**In-app purchases:** none


### System Design Refresher

[App page](https://appshunter.io/ios/app/system-design-refresher/id6760277935)

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

**In-app purchases:** none


## Frequently asked questions

### Is AlgoCards free?

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

### Is System Design Refresher free?

System Design Refresher is free to download, with no in-app purchases.

### Do AlgoCards or System Design Refresher have ads?

AlgoCards shows ads; System Design Refresher does not.

### Which is updated more often, AlgoCards or System Design Refresher?

AlgoCards ships an update every 9 days, and System Design Refresher monthly. Most recently, AlgoCards was updated on September 24, 2026 and System Design Refresher on September 12, 2026.

---

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