Prayagraj packs a great deal into a compact area, and a one-day visit lives or dies on three things most listings skip: the order you do it in, the truth about the Sangam boats, and what is actually open at the fort.
Order first. The single biggest time-waster in Prayagraj is criss-crossing the city. Experience My India runs the day in one clean physical loop - Sangam, then Bade Hanuman beside it, then the fort, then Alopi Devi, Anand Bhavan, Khusro Bagh and Azad Park - so you are never doubling back. And the Sangam goes first for a reason beyond traffic: at 6:00 AM the river is misty and still, the light is soft, and the boat ghat is far calmer than it becomes by mid-morning.
Then the boat, because this is where visitors most often get short-changed. The ghat is not the Sangam. The actual confluence, where the Ganga runs shallow and quick, the Yamuna deep and still, and the Saraswati is believed to join unseen, lies out in the water, and the only way to reach it and take the true dip is by boat. Fares are not fixed - shared boats run about Rs 100 to Rs 200 per person, private family boats about Rs 500 to Rs 2,000 - and the ghat is known for touts who quote far more and start bargaining the moment you arrive. Experience My India pre-arranges an authorised boat at a fair, fixed rate, so your group simply boards.
And the fort. The 16th-century Allahabad Fort that Akbar built over the confluence is under Army control, and most of it is closed. What you can usually see, with permission on the day, are the Akshayavat and the underground Patalpuri Temple - two sacred spots inside a working military installation, not a fort tour. Anand Bhavan and the Allahabad Museum both close on Mondays, so the day is planned around that too. Get the order, the boat and the fort right, and a one-day Prayagraj is unhurried rather than a scramble.