Comparison

Countdown vs Datum

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

Head to head
About

Countdown

Track upcoming events and past milestones with customizable countdowns and count-ups. Offers a free tier with essential features and a premium upgrade for advanced visualizations and integrations. Designed for a calm, glanceable experience.

Highlights
  • Unlimited countdowns and count-ups
  • Home-screen widget
  • Customizable visualizations
  • Workdays-only counting
  • Pattern dates for floating holidays
  • Apple Calendar sync
  • Lock Screen widgets
Features
Read full description

Count down to what matters. No ads. No account. Your countdowns sync privately through iCloud, so a new phone never means starting over. THE BASICS, FREE - Unlimited countdowns and count-ups (days since) - A free home-screen widget — no paywall on the basics - Beautiful editorial cards with curated colors - Tags, custom views, search, and archive - Workdays-only counting that skips weekends - Pattern dates like "3rd Sunday of May" for floating holidays PREMIUM Unlock everything with a one-time purchase. - Every visualization: dot grid, segments, rings, flip clock, bloom, orbit, temperature and more - Year Grid: every day of the year in one screen, your events shown as emoji - Photo backgrounds and a frosted Frost card finish - Custom fonts, decorations, and the full colour picker - Multi-event and Lock Screen widgets - Reminder notifications and two-way Apple Calendar sync DESIGNED TO FEEL CALM A warm, editorial look with custom typography — built for glancing, not fiddling. If dates sneak up on you (hello, time blindness), the grid shows everything coming at a glance, and Live Activities keep the big day on your Lock Screen. Prefer to buy once? The Lifetime unlock is a single purchase — no renewal, no expiry. Countdown Premium is also available as a monthly or annual subscription; the annual plan includes a 3-day free trial. Payment is charged to your Apple ID at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period; manage or cancel anytime in your App Store account settings. Privacy Policy: https://hellogoodday.com/privacy Terms of Use: https://hellogoodday.com/countdown/terms

About

Datum

This app allows you to track virtually anything, from daily habits to specific metrics, with customizable input methods and data visualization. It prioritizes user privacy by keeping all data on your device and offers extensive personalization options.

Highlights
  • Track anything with custom units
  • Multiple input styles (stepper, tally, dial)
  • Bundle trackers into check-ins
  • Pre-made check-in templates
  • Customizable dashboard and charts
  • Attach photos, voice notes, and text
  • Integrates with Siri and Shortcuts
Features
Read full description

The tracker that doesn't track you. You're probably already tracking things: gas mileage in a ratty old notebook in your glovebox, a Note called "plant watering," your memory for the headaches. Plus a folder of single-purpose apps that each demanded an account. Coffee. Mileage. Mood. Spending. Baby feedings. Practice hours. Pain levels. Sleep. Pull-ups. The sourdough starter. TRACK ANYTHING Create a tracker for anything in seconds. Pick its unit (miles, dollars, cups, °F, percent, or one you invent) and log with the capture style that fits: a stepper, a tally pad, a dial you spin. Yes/no habits, ratings, colors, and short notes work too. CHECK IN, DON'T FILL OUT Bundle trackers into check-ins (a morning check-in, a workout, a refuel) and log them all in one pass, with the note, photo, and weather attached to the moment. START FROM THE LIBRARY Browse ready-made check-ins (Rise & Shine, Refuel, Baby Log, Plant Care) and make them yours. Everything in the Library is free. SEE WHAT IT ADDS UP TO Trends, streaks, comparisons, distributions, heatmaps. Honest charts that never exaggerate your data, on a dashboard you arrange yourself. Scrub any chart with a finger. Every chart speaks VoiceOver. Share any view as an image. MAKE IT YOURS Dye the whole app your color: any tint, any backdrop, light or dark, not just an accent on a button. Charts, heatmaps, every screen wears your theme. Even our logo will, if you let it. Save your looks as presets. Your Datum won't look like anyone else's. MORE THAN NUMBERS Attach photos, voice notes, and text. Let a tracker capture location, weather, or your calendar automatically, only where you say so. PLAYS WELL WITH OTHERS Log by voice with Siri or wire Datum into your Shortcuts. Send a photo, a link, or text from any app straight into an entry with the share sheet. Import years of spreadsheet history from CSV. Share a check-in as a small file a friend can open in their own Datum, trackers included. YOURS. ACTUALLY YOURS. No account. No sign-up. No server of ours holding your life. Your data stays on your devices and in your private iCloud, syncing across your iPhone and iPad. We couldn't read it even if we wanted to. Export everything to CSV or JSON whenever you like. It's your data; leaving is easy, so we make staying worth it. NO SUBSCRIPTIONS Datum is free for up to 10 trackers and check-ins. Unlock unlimited forever with a single purchase. Nothing renews. Nothing is rented. Founding pricing is available through December 1, 2026. The price only goes up from here. Track anything. Keep it yours.

Screenshots

Countdown4 screens
Datum4 screens

Verdict

The call

The clearest difference is update cadence: Datum at every 2 days against Countdown's every 4 days. Countdown's advantage is device support (5 vs 2) and iOS requirement (17.4 vs 26.0). On price, rating, review sentiment and ratings volume 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. Countdown sells 3 in-app purchases, starting at $1.99 per month and Datum sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Countdown against 4.7 for Datum. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Countdown ships an update every 4 days, Datum every 2 days. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Countdown versus Datum: the parameters behind the verdict, then further details
ParameterCountdownDatum
PriceFreeFree
Rating4.6 (5 ratings)4.7 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings5 — better3
Update frequencyEvery 4 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Mac, Apple TV, Apple Watch — betteriPhone, iPad
Requires iOS17.4 — better26.0
Further details — not scored
Size26 MB98 MB
Age rating4+4+
DeveloperHello Good Day LLCEKPQA, LLC

Customer experience

Countdown

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Datum

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Countdown

Subscriptions2
  • Countdown Premium (Monthly)$1.991 Month
  • Countdown Premium (Annual)3 Days trial$6.991 Year
One-time1
  • Countdown Premium$9.99
7 purchases

Datum

One-time7
  • Calculated Fields$7.99
  • Attachments$7.99
  • Automations$7.99
Show 4 more
  • Unlimited Trackers$7.99
  • Connected Trackers$7.99
  • Datum Pro$19.99
  • Early Adopter$49.99

Questions

Is Countdown free?
Countdown is free to download, with in-app purchases available.
Is Datum free?
Datum is free to download, with in-app purchases available.
Which has better reviews, Countdown or Datum?
Datum is rated higher. Countdown averages 4.6 out of 5 from 5 ratings, while Datum averages 4.7 from 3 ratings.
Do Countdown or Datum have ads?
Neither Countdown nor Datum shows ads.
Which is updated more often, Countdown or Datum?
Countdown ships an update every 4 days, and Datum every 2 days. Most recently, Countdown was updated on October 10, 2026 and Datum on October 2, 2026.

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