Comparison

Countdown Stack vs One

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

Head to head
About

Countdown Stack

Easily track important upcoming events and personal goals. This app provides a clean interface to visualize your milestones, from birthdays to deadlines, across all your Apple devices. Unlock unlimited tracking and advanced features with an in-app purchase.

Highlights
  • Event and goal tracking
  • Clean and modern interface
  • Cross-device synchronization
  • Beautifully displayed countdowns
  • Unlimited countdowns (in-app purchase)
Features
Read full description

Your favorite events and goals are always just a glance away. Countdown Stack helps you stay organized and inspired by keeping track of what matters most, from birthdays and vacations to launches, anniversaries, and important deadlines. Designed with a clean and modern interface, it brings your upcoming moments to life across iPhone, iPad, Mac, and Apple Watch. Each countdown is beautifully displayed, letting you track your moments effortlessly wherever you are. Whether you’re planning a big day or simply looking forward to the weekend, Countdown Stack keeps your milestones front and center. Three countdowns are included for free, and you can unlock unlimited countdowns and additional features through an in-app purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

About

One

Features
Read full description

Ruthlessly simple one-tap event timestamp app. Capture any moment, symptom, habit, or shift in milliseconds with exact GPS coordinates, custom category tags, and offline CSV data exports. A MINIMAL EVENT LOGGER, NOT A BLOATED DIARY Most journal apps ask for paragraphs. Timeli asks for a single tap. It is a distraction-free timestamp recorder for the things you want an exact record of without typing: • Health & Symptoms: When the migraine or headache started, when the pain peaked, when you took a medication dose. • Habits & Routines: Daily water check-ins, meditation stamps, workouts, counter tallies, or baby feeds. • Work & Shifts: Clock-in timestamps, work hours, site visits, client appointments, and field work verification proof. HOW IT WORKS 1. Tap the logging button to capture a moment instantly. 2. Add custom tags, notes, or counter quantities. 3. Auto-stamp exact GPS location and timestamps. 4. View your daily rhythm, work hours, and history. 5. Export full activity logs to CSV. KEY FEATURES • One-Tap Instant Logging: Record timestamped events in milliseconds with zero friction. • Automatic GPS Tagging: Auto-attach exact latitude, longitude, and accuracy to every entry. • Custom Categories & Tags: Organize activities, symptoms, and habits with sleek color tags. • Timeline Insights: View your daily rhythm, patterns, and history effortlessly. • 100% Offline Privacy: Stored locally on your device. No cloud account or tracking. • CSV & JSON Export: Export clean, doctor-ready or employer-ready logs anytime. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://yellowsquared.us/timeli/privacy

Screenshots

Countdown Stack4 screens
One4 screens

Verdict

The call

The clearest difference is in-app purchases: One at none against Countdown Stack's 2. One also leads on update cadence (every 9 days vs every 2 months) and iOS requirement (15.0 vs 26.0). On price, ads and device support 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 Stack sells 2 in-app purchases, starting at $0.29 per month. One asks for nothing beyond the download.

UpkeepUpdate frequency

Countdown Stack ships an update every 2 months, One every 9 days. The most recent releases landed on September 24, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
Countdown Stack versus One: the parameters behind the verdict, then further details
ParameterCountdown StackOne
PriceFreeFree
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS26.015.0 — better
Further details — not scored
Size33 MB27 MB
Age rating4+4+
DeveloperDmitry KhotinskiyYellowsquared LLC

In-app purchases

2 purchases

Countdown Stack

Subscriptions2
  • Premium (Monthly)$0.291 Month
  • Premium (Annual)$2.491 Year
None

One

No in-app purchases

Questions

Is Countdown Stack free?
Countdown Stack is free to download, with in-app purchases available.
Is One free?
One is free to download, with no in-app purchases.
Do Countdown Stack or One have ads?
Neither Countdown Stack nor One shows ads.
Which is updated more often, Countdown Stack or One?
Countdown Stack ships an update every 2 months, and One every 9 days. Most recently, Countdown Stack was updated on September 24, 2026 and One on October 8, 2026.

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