Celestial Navigation Tools for French Sailors
France — Navigation, for consumers. Niche: Celestial Maritime Navigation Calculator.
score out of 100
- Demand16
40 ratings in the US and UK, 0 in France
- Room locally100
0 apps with 50 or more ratings in France
- Language gap100
3 of the top 3 without French
- Incumbent weakness33
4.7 stars on average; 2 of 3 not updated in a year
- AI gap100
3 of the top 3 not built around AI
- Momentum—
History building since 19 Oct 2026 — counted as neutral (50) for now
Why this is an opening
In France, 0 top apps offer local language support, while 3 non-native options dominate. Additionally, 2 out of 3 top apps are stale, resulting in a stale share of 67%. This creates a high local gap score of 100 for a French-tailored tool.
The leading apps
Ranked by ratings in the United States and United Kingdom; ratings and stars in France where it has them.
| App | Ratings in France | Ratings US + UK | Stars | French | Last update | AI |
|---|---|---|---|---|---|---|
| EZ Celestial NavigationNot in this store | 0 | 26 | 4.9 | No | Jan 2025 | No AI |
| CoNavNot in this store | 0 | 9 | 4 | No | Jul 2026 | No AI |
| Celestial NavigationNot in this store | 0 | 5 | — | No | Aug 2020 | No AI |
See all competitors, complaint themes and history — start the 7-day trial
Start the 7-day trialScored 2026-10-23 with score version 1. How the score works.