# GrappleTimer vs Underhook

The clearest difference is in-app purchases: GrappleTimer at none against Underhook's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Underhook sells 3 in-app purchases, starting at $7.99 per month. GrappleTimer asks for nothing beyond the download.

GrappleTimer ships an update daily, Underhook every 3 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | GrappleTimer | Underhook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (9 ratings)](https://appshunter.io/ios/app/underhook-bjj-and-jiu-jitsu/id6760555653/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 days |
| Monetization | — | Freemium |
| Size | 4 MB | 174 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BEN REEVE](https://appshunter.io/developer/1835532057) | [Oleksii Vasyliev](https://appshunter.io/developer/1884446171) |

## What reviewers say

### GrappleTimer

[App page](https://appshunter.io/ios/app/grappletimer/id6751516133)

**Features:** macOS Compatibility

**In-app purchases:** none


### Underhook

[App page](https://appshunter.io/ios/app/underhook-bjj-and-jiu-jitsu/id6760555653)

This app offers daily decision-training exercises for Brazilian Jiu-Jitsu practitioners. It provides a structured learning path with various formats to reinforce mat training and improve understanding of grappling positions and strategies.

**Highlights:** Structured learning path from white to blue belt, 1,000+ scenario questions, Multiple learning formats (lessons, quizzes, chats), Daily 5-minute training sessions, AI rival for realistic practice, Streak and progress tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Underhook Pro Monthly | $7.99 | per month |
| Underhook Pro Annual | $49.99 | per year |
| Underhook Pro Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is GrappleTimer free?

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

### Is Underhook free?

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

### Do GrappleTimer or Underhook have ads?

Neither GrappleTimer nor Underhook shows ads.

### Which is updated more often, GrappleTimer or Underhook?

GrappleTimer ships an update daily, and Underhook every 3 days. Most recently, GrappleTimer was updated on October 30, 2026 and Underhook on October 31, 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.*