# Artemis Mission Tracker vs Deja Entendu Study

The clearest difference is review sentiment: Deja Entendu Study at 100% against Artemis Mission Tracker's 24%. Deja Entendu Study also leads on rating (5.0 vs 4.2) and in-app purchases (none vs 7). Artemis Mission Tracker's advantage is price (Free vs $0.99) and update cadence (every 5 days vs every 2 weeks). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Artemis Mission Tracker is free to download; Deja Entendu Study costs $0.99 up front. Artemis Mission Tracker sells 7 in-app purchases, starting at $3.99 per month. Deja Entendu Study asks for nothing beyond the download.

Deja Entendu Study holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 11 respectively. Written reviews point the same way: 24% of Artemis Mission Tracker's written reviews are positive against 100% of Deja Entendu Study's.

Artemis Mission Tracker ships an update every 5 days, Deja Entendu Study every 2 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Artemis Mission Tracker | Deja Entendu Study |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/artemis-mission-tracker/id6761183798/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/deja-entendu-study/id6804275732/reviews)** |
| Number of ratings | 5 | **11** |
| Positive reviews | 24.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | **Freemium** | Paid |
| Size | 25 MB | 2 MB |
| Requires iOS | 26.4 | **26.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Orbital Momentum AS](https://appshunter.io/developer/6776392287) | [Christopher Arnold](https://appshunter.io/developer/6804275735) |

## What reviewers say

### 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 |


### Deja Entendu Study

[App page](https://appshunter.io/ios/app/deja-entendu-study/id6804275732)

This app helps you learn languages by transcribing audio and images into flashcards. It offers on-device processing for privacy and allows you to import notes or audio files. New features include pronunciation speed control and direct speech input.

**Highlights:** Transcribe audio and images, Create flashcards, On-device processing, Import class notes, Translate audio files, Adjust pronunciation speed, Direct speech input

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

**In-app purchases:** none


## Frequently asked questions

### Is Artemis Mission Tracker free?

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

### Is Deja Entendu Study free?

Deja Entendu Study costs $0.99, with no in-app purchases.

### Which has better reviews, Artemis Mission Tracker or Deja Entendu Study?

Deja Entendu Study is rated higher. Artemis Mission Tracker averages 4.2 out of 5 from 5 ratings, while Deja Entendu Study averages 5.0 from 11 ratings.

### Do Artemis Mission Tracker or Deja Entendu Study have ads?

Neither Artemis Mission Tracker nor Deja Entendu Study shows ads.

### Which is updated more often, Artemis Mission Tracker or Deja Entendu Study?

Artemis Mission Tracker ships an update every 5 days, and Deja Entendu Study every 2 weeks. Most recently, Artemis Mission Tracker was updated on October 31, 2026 and Deja Entendu Study on October 31, 2026.

---

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