What does the Bible teach about Apostles?
Literally, apostle means “sent out,” “one who is sent out.” With that idea in mind, the title of Apostle is reserved for those twelve men who Jesus personally instructed and commissioned to spread the gospel after Christ’s resurrection.
These are the only Apostles. There are no Apostles today.
What does Mormonism teach about Apostles?
In Mormonism, apostles are called by God, though not personally commissioned by Jesus. Mormonism teaches that the original Apostles should have been replaced, but the early church failed and went into total apostasy.
An ‘apostle’ is an ordained leader in the Melchizedek Priesthood in The Church of Jesus Christ of Latter-day Saints. Apostles are chosen through inspiration by the President of the Church, sustained by the general membership of the Church, and ordained by the First Presidency and Quorum of the Twelve Apostles by the laying on of hands. … In addition to serving as witnesses of Jesus Christ to all the world (Doctrine and Covenants 107:23), as Jesus’ apostles did, members of the current Quorum of the Twelve Apostles hold the keys of the priesthood — that is, the rights of presidency (Doctrine and Covenants 107:35; cf. 124:128).
Encyclopedia of Mormonism, 1:59-60 (1992)
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The twelve, personally instructed and commissioned by Jesus.
A priesthood office of high authority.