There is no universal rule that says a Monstera should be watered every seven, ten or fourteen days. Drying speed changes with light, temperature, humidity, pot size, substrate, root mass and season.
Check the substrate
Feel below the very top layer rather than judging only the surface. In a chunky mix, you can also observe whether moisture remains deeper in the container.
Learn the weight of the pot
A freshly watered pot is noticeably heavier than the same pot after much of the available water has been used or evaporated. Learning that difference gives you another useful clue.
Watch the environment
A plant receiving stronger light in warm conditions may use water faster than the same plant in cooler, lower-light conditions. A large established root system may also use moisture differently from a recently rooted cutting.
Water thoroughly when you do water
For conventionally potted Monsteras, thoroughly wetting the substrate and allowing excess water to drain can produce more even moisture than repeatedly adding tiny amounts.
Hendo Tip: Use multiple signals. The calendar can remind you to check the plant, but the plant should decide whether it gets watered.