245+ iOS apps curated and reviewed
The best geology dictionary apps on iPhone average 3.8★ across 245+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (1) | No | Yes | May 2026 | |
| 2 |  | Free | 3.4★ (5) | Yes | Yes | May 2026 | |
| 3 |  | Free | 1.0★ (1) | No | No | May 2026 | |
| 4 |  | Free | 1.3★ (7) | No | No | May 2026 | |
| 5 |  | Free | 3.2★ (6) | No | No | May 2026 | |
| 6 |  | Free | 5.0★ (6) | No | Yes | May 2026 | |
| 7 |  | Free | 4.6★ (25) | No | Yes | Sep 2026 | |
| 8 |  | Free | 4.4★ (94) | No | Yes | Sep 2026 |
This app serves as a comprehensive personal guide for learning geology, offering a dictionary of terms with flashcards and visual explanations. It also includes video lectures and a detailed textbook covering major geological topics.
Access a vast offline dictionary of geological terms with definitions, synonyms, and audio pronunciations. Learn about Earth sciences, save favorite words, and test your knowledge with quizzes. Share terms easily with friends.
Access a comprehensive offline dictionary of geological terms and words. This free application provides thousands of entries, an alphabetical listing, and a search tool, making it ideal for learning and reference without an internet connection.
