A lot of players, while playing poker on-line, use the program named as «Poker Calculators». Some of these programs work only by hand mode. But some read given directly from poker clients. Exactly they are named online poker calculators.

The majority of Calculators are designed for Texas Holdem. What is no strange, because the big part of online poker play is Texas Holdem.
Does this legally to use Texas Holdem On-line Calculator?

Yes, the major poker rooms are legal. And most of players use it. I do not see great ethic problems in it. Majority of good players in Texas Holdem produce calculation in their mind.

You will not blame someone, when one use calculator in order to count the tax? Even if you do this as quick as in your wit. By essence the Texas Holdem On-line Calculator are same calculators but tuned to do definite tasks.

Such calculators do not take decision for the player. It only gives prompt (help). I played sufficiently on such calculators for a long time. That time I played nightmarish. My result was +-0. I did mistakes more seldom then I acted without the prompter. But I was getting on trap more often.

Well in a conclusion, I can advise you only Texas Holdem On-line Calculator – Poker Indicator. I used it in practice and it proved itself from good side. Main particularity of this software is access statistics of the players. When I was not known of the presence Poker Ace HUD, Poker Indicator rescued me more often.