O vs Countdowner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
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Mit der O-TIS App haben Sie über Ihr Smartphone Zugriff auf alle Termine im Termin-Infosystem von EVIDENT (TIS) und können in Sekundenschnelle sehen, wann auf welchen Behandler welcher Patient wartet, inklusive Details zu Standorten, Behandlungen, Räumen und Patientendaten. Und wenn es bei einem privaten Treffen mit einem Bekannten auf eine Terminvereinbarung hinausläuft, so können Sie das über die App gleich an Ort und Stelle selbst in TIS eintragen, mit Standort, Behandler und Behandlungsart. Noch Fragen? Weitere Informationen erhalten Sie hier: https://www.online-tis.de/app.php
Countdowner
Easily track important dates like birthdays, vacations, and weddings with custom countdowns. Add widgets to your home and lock screens for quick visibility and receive timely reminders. Sync across devices and Apple Watch for seamless event tracking.
- Unlimited custom countdowns
- Home and Lock Screen widgets
- Local event reminders
- Apple Watch sync
- iCloud device sync
- Customizable themes and icons
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Count down to the moments you're looking forward to – birthdays, vacations, weddings, exams and every big day in between. See the days left at a glance on your Home Screen, Lock Screen and Apple Watch. WHY COUNTDOWNER • Unlimited countdowns – with a date or exact time, notes, colors, icons or any emoji • Home Screen & Lock Screen widgets – your next event always in view, with a live ticking timer • Smart reminders – 1 week before, 1 day before and right when it happens • Apple Watch app – check how long is left, right from your wrist • iCloud sync – your countdowns on all your devices • One-time purchase – no subscription, no sign-up HOW IT WORKS 1. Tap +, name your event and pick the date 2. Choose a color and an icon or emoji 3. Add a widget – done PERFECT FOR Birthdays · Vacations & trips · Weddings & anniversaries · Exams & deadlines · Christmas & New Year · Concerts & festivals · Due dates · Retirement MAKE IT YOURS Light or dark theme, compact or detailed display, English or German – and decide whether past events stay visible or disappear. Start your first countdown today and enjoy the anticipation.
Screenshots
Verdict
The clearest difference is price: O at Free against Countdowner's $0.99. O also leads on iOS requirement (16.4 vs 18). Countdowner's advantage is update cadence (every 3 weeks vs every 4 months). On ads, in-app purchases 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
O is free to download; Countdowner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
O ships an update every 4 months, Countdowner every 3 weeks. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | O | Countdowner |
|---|---|---|
| Price | Free — better | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 16.4 — better | 18 |
| Further details — not scored | ||
| Size | 43 MB | 6 MB |
| Age rating | 17+ | 4+ |
| Developer | blassl & partner | Fabian Will |
In-app purchases
O
No in-app purchases
Countdowner
No in-app purchases
