Link referensi:

1. Astronomy Engine,
2. Ummul Quro,
3. Moonsighting,
4. The SkyLive.com,
5. Heavens-above.com,
6. Web Stellarium,
7. Phase Calendar,
8. Time & Date,
   
9. Al-habib Info,
10. BMKG,
11. Falakiyah,
12. Hasil hisab,
13. Youtube,
14. Link Moon Phase,
15. Solar Eclipse Map,
16. Eclipse NASA,
17. Lunar Eclipse Map,
18. Islamic Prayer Times,
19. PrayTimes.org,
20. Solar Calculator,
21. Beberapa aplikasi Windows dan android free ataupun berbayar sebagai pembanding hasil hitungan, yaitu:
    • Accurate Times,
    • Hisab Astronomi,
    • Google Earth,
    • Digital Falak,
    • Maktabah Falakiyah,
    • Daff Moon,
    • Lunescope,
    • Stellarium Windows,
    • Stellarium mobile,
    • SkyPortal,
    • Islamic Times,
    • SkyView,
    • Sky Map

File apk android kalender ini: UNDUH