Why Apps Bundle All Three
Because different shapes suit different moods, and a platform holding all of them keeps a player when one stops appealing. A build offering big small, exact-number bets and a daily draw is not offering three games so much as three ways to keep the same person betting through the evening — and the switch usually happens after a losing run, in the direction of the larger payout.
That switch is worth noticing when you make it. Moving from an even-money bet to a nine-times bet after losses is not a change of strategy; it is an increase in exposure at the moment least likely to be a good idea, and the exact-number bet usually carries the larger edge of the two.
Which One to Prefer, If Any
Of the three, the simple even-money bet usually has the smallest edge and the most transparent maths — you can verify what it pays in a minute. That does not make it a good way to spend money; it makes it the least bad of a set, and the honest recommendation is still to decide an amount in advance and treat it as spent.
For the mechanics of the round-based format, see the big small game guide. For how the same round is sold with colour labels and extra bet types, read the colour trading page.