# GRE Math Knight vs LienClock

The clearest difference is in-app purchases: GRE Math Knight at none against LienClock's 2. GRE Math Knight also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.2). LienClock's advantage is update cadence (weekly vs monthly). On price and ads there is nothing between them.

Both are free to download. LienClock sells 2 in-app purchases, starting at $9.99 per year. GRE Math Knight asks for nothing beyond the download.

GRE Math Knight ships an update monthly, LienClock weekly. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | GRE Math Knight | LienClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (52 ratings)](https://appshunter.io/ios/app/gre-math-knight/id1535485326/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 53.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Paid | — |
| Size | 133 MB | 6 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Vince Kotchian Test Prep](https://appshunter.io/developer/1526464975) | [慧慧 高](https://appshunter.io/developer/1887721875) |

## What reviewers say

### GRE Math Knight

[App page](https://appshunter.io/ios/app/gre-math-knight/id1535485326)

Practice GRE math concepts by battling monsters. This game covers arithmetic, algebra, geometry, and data analysis, with formula scrolls and mini-games to enhance learning. Become a GRE math knight and save the kingdom.

**Highlights:** GRE math concept practice, Arithmetic, algebra, geometry, data analysis, Formula scrolls, Mini-games, Monster battling gameplay

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

**In-app purchases:** none


### LienClock

[App page](https://appshunter.io/ios/app/lienclock/id6774528121)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Annual | $9.99 | per year |
| Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is GRE Math Knight free?

GRE Math Knight is free to download, with no in-app purchases.

### Is LienClock free?

LienClock is free to download, with in-app purchases available.

### Do GRE Math Knight or LienClock have ads?

Neither GRE Math Knight nor LienClock shows ads.

### Which is updated more often, GRE Math Knight or LienClock?

GRE Math Knight ships an update monthly, and LienClock weekly. Most recently, GRE Math Knight was updated on November 3, 2026 and LienClock on October 28, 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.*