Ops Clock vs Calendário Permanente
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ops Clock
A versatile utility app offering a world clock with over 400 cities, unlimited timers, and three powerful calculators for time zone, time, and date arithmetic. It also features an event log to track real-time occurrences and elapsed times.
- World clock with 400+ cities
- Unlimited count-up and countdown timers
- Time zone, time, and date calculators
- Event log with elapsed time tracking
- Customizable labels and notifications
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Professional grade clock and timer tool with four functions in one app: • World clock • Digital seconds display • Compact format • Over 400 cities • Set custom labels • Clocks sorted automatically • Unlimited number of timers • Count-up timers • Countdown timers • Wall clock timers • End-time notifications • Pre-notifications • Elapsed time and ETA in any zone • Three calculators • Time zone calculator helps plan multi-city conf calls • Time calculator for time arithmetic, including across different time zones • Date calculator for date arithmetic • Event Log • Stores a record of real-time events • Shows elapsed time between events This app is free, shows no advertisements, makes no use of the network and collects no personal information. Available in English, Spanish, French, Italian and Portuguese.
Calendário Permanente
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Este é o Calendário Permanente, uma reedição dos engenhosos calendários perpétuos desenvolvidos na Idade Média. Nele, combinamos conhecimentos matemáticos antigos com tecnologia de realidade aumentada. Para acessar o relógio + previsão do tempo é necessário ter a peça física ou acessar o site calendario.allesblau.studio. O Calendário Permanente é uma criação do estúdio de design Alles Blau em colaboração com os desenvolvedores da Maldelbrot em dezembro de 2019.
Screenshots
Verdict
The clearest difference is update cadence: Calendário Permanente at every 2 days against Ops Clock's every 5 months. Calendário Permanente also leads on iOS requirement (11.0 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ops Clock ships an update every 5 months, Calendário Permanente every 2 days. Both last shipped on October 26, 2026.
| Parameter | Ops Clock | Calendário Permanente |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (11 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 5 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | James Kretchmar | asa.tc |
In-app purchases
Ops Clock
No in-app purchases
Calendário Permanente
No in-app purchases
Questions
Is Ops Clock free?
Is Calendário Permanente free?
Do Ops Clock or Calendário Permanente have ads?
Which is updated more often, Ops Clock or Calendário Permanente?
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