Comparison

ThisDay vs SessionStack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ThisDay

This app organizes your day by placing all tasks, notes, voice memos, events, and habits onto a real calendar date. It integrates with Apple Health for habit tracking and syncs with Apple Reminders, ensuring nothing gets buried and everything is accessible.

Highlights
  • Tasks, notes, voice memos, events, and habits on real dates
  • Habit tracking integrated with Apple Health
  • Syncs with Apple Reminders
  • Unfinished tasks roll over to the next day
  • Quick capture and day bar for easy access
  • Widgets and Live Activities support
Features
Read full description

Not someday. ThisDay. Most planners hand you a backlog. ThisDay hands you a day. Every task, note, voice memo, event and habit lands on a real date; not in a someday pile you scroll past for months. Open the app and there is one thing in front of you: today, in the order it happens. ONE DAY, EVERY KIND OF THING Tasks, events, notes, voice memos, photos and habits share one list, because they share one day. A habit at 10:00 sits between the 9:00 task and the 11:00 meeting, where it belongs. Same row, same swipe, same checkbox, whatever kind of thing it is. Your own calendars appear inline too, at the hour they happen, so a morning with a meeting in it never looks free. EVERYTHING CAN REMIND YOU Record a voice memo and put a reminder on it. Write a note and have it find you at 6pm. Your phone can already take a voice memo, it just can't tell you about it later. ThisDay can. HABITS THAT TICK THEMSELVES Point a habit at Apple Health and stop reporting on yourself. Steps, exercise minutes, active energy, sleep, the Watch's three rings, and workouts from running to yoga. Set the number you're aiming at; ThisDay watches for it and fills the ring as your day fills it. ThisDay only reads Health, never writes to it, and only the measurement each habit names. Nothing leaves your device. And a habit is never marked done because a sensor said so and you disagreed. No reading is ever "done"; if your watch was on the charger, the tick is still yours to make. Your tick always wins. APPLE REMINDERS, BOTH WAYS The Reminders lists you choose show up in your day, next to everything else, read-only: ThisDay never edits somebody else's row. And when you ask for it, the other direction. Tasks you make here are written back out as reminders, so they reach Siri, a Mac that doesn't run ThisDay, and anyone you share a list with. Switching it off takes the copies back out. NOTHING GETS BURIED Unfinished work follows you to today instead of quietly aging on a date you've already passed. Completed things can leave the list or stay in a folded section, your call. MOMENTS Keep a photo from a day worth keeping. Months later it's still filed under the day it happened on. THE DAY BAR Lives at the bottom of the screen and holds the whole app in one thumb's reach: capture anything, jump to any day, and see what's running without leaving what you're looking at. ALSO IN HERE • Quick capture for every kind of item • Reminders, repeats and rollover • Categories, priorities and links • Month, week and year calendar views • An inbox for anything without a day yet • Multi-select for bulk edits • Widgets and Live Activities • Shortcuts and Siri • Ten languages, every screen in each one • Light and dark, and an accent you choose • Your day on every iPhone you own BUILT BY ONE PERSON There is no account and no sign-up, because there is no server to sign up to. No analytics, no tracking, and nothing sold to anyone; your day never leaves your device. Something broken or missing? Write to hello@akilastudio.com and you'll get a reply from the person who made it. TRY IT, THEN OWN IT ThisDay is free for 21 days with everything included; no card up front and nothing to cancel. After that it's a one-time purchase and it's yours for good. No subscription, no renewal. ThisDay for Mac is a separate app, sold separately on the Mac App Store.

About

SessionStack

Features
Read full description

Plan your AWS re:Invent 2026 week without the spreadsheet chaos. 2200+ sessions across six venues on the Strip. Ask in one sentence and the AI turns it into filters you can see. Leave an afternoon open and it suggests what is worth your time and actually reachable. And it will never book you two talks twenty minutes apart at opposite ends of the Strip.

Screenshots

ThisDay4 screens
SessionStack4 screens

Verdict

The call

The clearest difference is in-app purchases: SessionStack at none against ThisDay's 1. SessionStack also leads on update cadence (every 3 days vs every 9 days) and iOS requirement (16.4 vs 18.0). ThisDay's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ThisDay sells 1 one-off in-app purchase. SessionStack asks for nothing beyond the download.

UpkeepUpdate frequency

ThisDay ships an update every 9 days, SessionStack every 3 days. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 6 level
ThisDay versus SessionStack: the parameters behind the verdict, then further details
ParameterThisDaySessionStack
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 9 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.016.4 — better
Further details — not scored
Size51 MB70 MB
Age rating4+4+
DeveloperAgustin Dell AquilaJoannes van Eijk

In-app purchases

1 purchases

ThisDay

One-time1
  • ThisDay$14.99
None

SessionStack

No in-app purchases

Questions

Is ThisDay free?
ThisDay is free to download, with in-app purchases available.
Is SessionStack free?
SessionStack is free to download, with no in-app purchases.
Do ThisDay or SessionStack have ads?
Neither ThisDay nor SessionStack shows ads.
Which is updated more often, ThisDay or SessionStack?
ThisDay ships an update every 9 days, and SessionStack every 3 days. Most recently, ThisDay was updated on October 10, 2026 and SessionStack on October 3, 2026.

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