# Learn JSON | JSON Tutor vs Artemis Mission Tracker

The clearest difference is price: Artemis Mission Tracker at Free against Learn JSON | JSON Tutor's $1.99. Learn JSON | JSON Tutor's advantage is in-app purchases (none vs 7) and iOS requirement (13.0 vs 26.4). On ads and device support there is nothing between them.

Artemis Mission Tracker is free to download; Learn JSON | JSON Tutor costs $1.99 up front. Artemis Mission Tracker sells 7 in-app purchases, starting at $3.99 per month. Learn JSON | JSON Tutor asks for nothing beyond the download.

## The numbers

| Metric | Learn JSON | JSON Tutor | Artemis Mission Tracker |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/artemis-mission-tracker/id6761183798/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 24.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Monetization | — | Freemium |
| Size | 41 MB | 25 MB |
| Requires iOS | **13.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Muhammad Umair](https://appshunter.io/developer/1696049320) | [Orbital Momentum AS](https://appshunter.io/developer/6776392287) |

## What reviewers say

### Learn JSON | JSON Tutor

[App page](https://appshunter.io/ios/app/learn-json-json-tutor/id6754789917)

**Features:** macOS Compatibility

**In-app purchases:** none


### Artemis Mission Tracker

[App page](https://appshunter.io/ios/app/artemis-mission-tracker/id6761183798)

Follow humanity's return to the Moon and NASA's Moon Base program. Get live countdowns to mission milestones, crew profiles, and mission overviews. Access curated launch history and important mission documents.

**Highlights:** Live countdowns to mission milestones, Full crew profiles, Mission overview with SLS, Orion, Starship HLS, and Gateway context, NASA announcements and live event alerts, Curated launch history, Key mission documents

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Artemis+ Monthly | $3.99 | per month |
| Artemis+ Yearly | $19.99 | per year |
| Small Tip | $1.99 | one-time |
| Mission Control | $3.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |
| Artemis+ Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Learn JSON | JSON Tutor free?

Learn JSON | JSON Tutor costs $1.99, with no in-app purchases.

### Is Artemis Mission Tracker free?

Artemis Mission Tracker is free to download, with in-app purchases available.

### Do Learn JSON | JSON Tutor or Artemis Mission Tracker have ads?

Neither Learn JSON | JSON Tutor nor Artemis Mission Tracker shows ads.

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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.*