Comparison

DayCommand vs Slipster

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

Head to head
About

DayCommand

Features
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DayCommand understands what you type or say — no forms, no menus, no tapping through a dozen fields. "standup every weekday 9am" creates a recurring event on every calendar you've connected. "move lunch to 3pm" finds it and moves it. "cancel gym tomorrow" removes it — with an undo. "am I free at 3?" and "find 30 min for a run" answer questions your calendar app has never been able to. WHAT MAKES IT DIFFERENT • On-device, not cloud. Parsing runs entirely on your phone — no message limits, no monthly quota, no round-trip to a server. It works on a plane. • One command, every calendar. Connect Apple, Google, and Outlook calendars at once, and a single command writes to all of them — moves, renames, and deletes fan out everywhere automatically, so your calendars never drift out of sync with each other. • Real mutations, not just creation. Most "smart" calendar apps can only parse new events. This one moves, renames, resizes, and cancels existing events by fuzzy-matched title — and answers scheduling questions directly. • Genuinely private. Your calendar data goes only to the accounts you connect. Voice dictation runs on-device (Apple CoreML). Nothing about how the app understands your commands is sent anywhere. FEATURES • Natural-language create, move, rename, resize, and cancel — with a confirm card before anything destructive happens • Recurring events: daily/weekly/monthly, intervals, ordinal weekdays ("first Monday of the month"), end dates • Free-time finder: "find 30 min for a run" returns bookable time slots • 60-day agenda with a week strip, live parse preview as you type • Voice dictation, fully on-device • Home Screen widgets • Siri quick-add • Conflict detection when two events would overlap • Time-zone awareness for events created while traveling DayCommand connects to Apple Calendar (iCloud), Google Calendar, and Outlook/Microsoft 365 Calendar. Connect one or all three — everything works the same either way.

About

Slipster

Features
Read full description

Slipster turns your to-do list into 15-minute tiles you can actually schedule - capture a task, size it, and either drop it onto your calendar or leave it in the list for later. CAPTURE FAST, SCHEDULE WHEN YOU'RE READY Add a task in seconds. Every task is sized in 15-minute units (1x-8x, so up to 2 hours) - small enough to actually start, not another vague "someday" item. Leave it in the list, or schedule it straight onto your day. YOUR OWN CALENDAR, NOT A TAKEOVER Schedule a task and Slipster creates its own "Slipster" calendar right on your device - no Google sign-in required, just one permission tap. It sits alongside your existing calendars, never mixed into them. It's two-way: move or rename the event in Calendar and Slipster picks up the change automatically. The list is always the source of truth - putting a task on the calendar is a loan, not a move. FOUR WAYS TO SEE YOUR DAY List, Day, Agenda, and Week views, plus categories (Home, Work, Shopping, and your own) so you can filter down to just what's relevant right now. RECURRING TASKS THAT DON'T MAKE YOU RE-TYPE THEM Set a task up once as a template - fixed day or floating to the next open slot - and stop retyping "bins out" or "water the plants" every single week. THE GAP-FILLER Slipster checks your other calendars' free/busy time and surfaces tasks that actually fit the gap you have right now - instead of leaving you to eyeball your calendar and guess. SLIPSTER PRO Everything above is free, forever - it's never getting paywalled retroactively. Slipster Pro is an optional subscription that adds sync across all your devices, so your list and schedule stay in step everywhere you use Slipster. No ads, no streaks, no guilt-trip notifications - just an honest way to get from "I should do that sometime" to it actually being on your calendar. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

DayCommand4 screens
Slipster4 screens

Verdict

The call

The clearest difference is in-app purchases: DayCommand at none against Slipster's 2. Slipster's advantage is update cadence (daily vs every 4 weeks). On price, ads, device support and iOS requirement 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. Slipster sells 2 in-app purchases, starting at $2.99 per month. DayCommand asks for nothing beyond the download.

UpkeepUpdate frequency

DayCommand ships an update every 4 weeks, Slipster daily. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard2 real differences · 4 level
DayCommand versus Slipster: the parameters behind the verdict, then further details
ParameterDayCommandSlipster
PriceFreeFree
Update frequencyEvery 4 weeksDaily — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size16 MB29 MB
Age rating4+4+
DeveloperSadd Tech LLCDCB Productions

In-app purchases

None

DayCommand

No in-app purchases

2 purchases

Slipster

Subscriptions2
  • Slipster Pro Monthly$2.991 Month
  • Cross Device Sync - Yearly$29.991 Year

Questions

Is DayCommand free?
DayCommand is free to download, with no in-app purchases.
Is Slipster free?
Slipster is free to download, with in-app purchases available.
Do DayCommand or Slipster have ads?
Neither DayCommand nor Slipster shows ads.
Which is updated more often, DayCommand or Slipster?
DayCommand ships an update every 4 weeks, and Slipster daily. Most recently, DayCommand was updated on October 31, 2026 and Slipster on November 6, 2026.

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