Preces Gertrudianae : Prayers of St. Gertrude and St. Mechtilde
This app is a manual of devotions compiled in the seventeenth century from divine suggestions of piety of St. Gertrude and St. Mechtilde, nuns of the Order of St. Benedict. Concerning this work Alban Butler says, in his life of St. Gertrude, that it is "perhaps the single most useful production, next to the writings of St. Teresa, with which any female saint ever enriched the Church." Care has been taken to preserve, not only the substance, but, as far as might be, the form, of the original prayers."
Saint Mechtilde of Hackeborn (1241 - 1298) was a Saxon Christian saint (from what is now Germany) and a Benedictine nun.
Gertrude the Great (or Saint Gertrude, 1256 - 1302) was a German Benedictine nun, mystic, and theologian.