There are many zmanim websites out there, and they all serve their own purpose.
But these websites provide too much information for one who just wants to know when the zmanim are.
It is very confusing, when you see over five different zmanim for when Layla is.
Do I really know the difference between nightfall at 8.5 and 10 degrees?
And if I want to keep Rabbeinu Tam, do I know the difference between 72 minutes and 18.5 degrees?
Maybe the various zmanim are useful when you are in the beis medrash, learning the sugya of zmanim.
But please, just give me one standard zman!
This is exactly what you will see on TrueZmanim.
Only the relevant and common zmanim.
Nothing more.

Alos (עלות השחר) – Beginning of the halachic day. When the sun is approximately 16.1 degrees beneath the horizon.
Yakir (משיכיר) – The earliest one may put on tallis and tefillin. When the sun is approximately 10.5 degrees beneath the horizon.
Netz (נץ החמה) – Sunrise
Sof Zman Krias Shma MGA (סוף זמן קריאת שמע, מגן אברהם) – The latest time that Krias Shma can be recited, according to the Mogen Avrohom. Occurs at 3 variable hours, calculated from Alos until Tzais.
Sof Zman Krias Shma GRA (סוף זמן קריאת שמע, הגאון מווילנא) – The latest time that Krias Shma can be recited, according to the Vilna Gaon. Occurs at 3 variable hours, calculated from Netz until Shika.
Sof Zman Tefila MGA (סוף זמן קריאת שמע, מגן אברהם) – The latest time that the Shmoneh Esreh can be recited, according to the Mogen Avrohom. Occurs at 4 variable hours, calculated from Alos until Tzais.
Sof Zman Tefila GRA (סוף זמן קריאת שמע, הגאון מווילנא) – The latest time that the Shmoneh Esreh can be recited, according to the Vilna Gaon. Occurs at 4 variable hours, calculated from Netz until Shika.
Chatzos (חצות) – Midday (and night). Occurs at 6 variable hours, calculated from Netz until Shika.
Mincha Gedola (מנחה גדולה) – The earliest time one may daven Mincha. Occurs ½ hour (variable or clock) after Chatzos.
Mincha Ketana (מנחה קטנה) – A preferred time to daven Mincha. Occurs 9.5 variable hours after Netz.
Plag (פלג המנחה) – Halfway between Mincha Ketana and Shkia. The earliest time one may accept Shabbos.
Shkia (שקיעת החמה) - Sunset
Tzais (צאת הכוכבים) – Nightfall. When the sun is approximately 8.5 degrees beneath the horizon.
Rabbeinu Tam (רבינו תם) – An alternate time for nightfall. Approximately 72 minutes after Shkia.