*Magnificat *has the prayers of the Mass, daily Mass readings, a set of morning and evening prayers (resembling a “lite” version of the Liturgy of the Hours, but not the official one), brief meditations, and brief profiles of saints. (It may have other elements, but I don’t subscribe so I don’t remember.) I think it is published once a month.
I’m not sure about a daily missal, but I would expect it would contain the prayers of the Mass and daily Mass readings for a whole year.
In Conversation with God does not have the actual daily Mass readings, but it has longer (about six pages per day) meditations on the daily Mass readings. (You can find the actual Mass readings here
usccb.org/nab/ .)
In Conversation with God is excellent, and if I could only get one of your three choices, that is where I would put my money. The author (Fernandez) is a follower of the spirituality of Saint Josemaria Escriva, founder of Opus Dei. The meditations are geared toward people whose apostolate is in the everyday working world — professionals, laborers, students, mothers of families, etc. The series has seven volumes (Advent/Christmas, Lent/Easter, four volumes of Ordinary Time, and special feasts). It includes separate Sunday meditations for Years A, B, and C. For weekdays, there is only one meditation for each day of the liturgical year, so they do not always match the current daily Mass readings (e.g., for today, Saturday of the 32nd Week in Ordinary Time, it would give meditations on the readings from either Year A or B, but not both).