# JDK vs Migrelle

The clearest difference is in-app purchases: JDK at none against Migrelle's 3. Migrelle's advantage is ads (none vs shown) and update cadence (every 4 days vs every 13 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Migrelle sells 3 in-app purchases, starting at $5.79 per month. JDK asks for nothing beyond the download.

JDK ships an update every 13 months, Migrelle every 4 days. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | JDK | Migrelle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 4 days** |
| Size | 59 MB | 51 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [OVERCLOUDS SRL](https://appshunter.io/developer/1851998468) | [Norbert Banaszek](https://appshunter.io/developer/1431428086) |

## What reviewers say

### JDK

[App page](https://appshunter.io/ios/app/jdk/id1641306987)

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

**In-app purchases:** none


### Migrelle

[App page](https://appshunter.io/ios/app/migrelle-migraine-tracker/id6786698083)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Migrelle Pro Monthly | $5.79 | per month |
| Migrelle Pro Yearly | $33.49 | per year |
| Migrelle Pro Lifetime | $99.90 | one-time |


## Frequently asked questions

### Is JDK free?

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

### Is Migrelle free?

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

### Do JDK or Migrelle have ads?

JDK shows ads; Migrelle does not.

### Which is updated more often, JDK or Migrelle?

JDK ships an update every 13 months, and Migrelle every 4 days. Most recently, JDK was updated on October 27, 2026 and Migrelle on October 29, 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.*