  We consider modified $f(R)$ gravity which may unify $R^m$ early-time
inflation with late-time $\Lambda$CDM epoch. It is shown that such model passes
the local tests (Newton law, stability of Earth-like gravitational solution,
very heavy mass for additional scalar degree of freedom) and suggests the
realistic alternative for General Relativity. Various scenarios for future
evolution of $f(R)$ $\Lambda$CDM era are discussed.
