Ops Clock vs Volume Calculator Pro
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.
Volume Calculator Pro
This utility app quickly calculates and converts volumes between imperial and metric systems. Input dimensions like width, length, and depth to get instant results in various units. It supports multiple measurement systems for easy conversion.
- Real-time volume conversion
- Imperial and metric unit support
- Calculate volume from dimensions
- Supports centimeters, meters, inches, feet, and yards
- Outputs cubic centimeters, meters, inches, feet, and yards
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Volume Calculator Pro is the fastest calculator a volume that quickly convert between the imperial and the metric system’s units in real time and without any hassle. Just provide a width, length, depth and you’ll get an volume, instantaneously. Volume Calculator Pro can also quickly determine volume based on width, length and depth expressed in: 1. Centimeters 2. Meters 3. Inches 4. Feet 5. Yards Volume can also quickly determine in: 1. Cubic Centimeters 2. Cubic Meters 3. Cubic Inches 4. Cubic Feet 5. Cubic Yards Calculate and convert volume quickly and as you want. --- The Terms of Use https://feelmanapp.com/terms-conditions-for-volume-calculator-pro/
Screenshots
Verdict
The clearest difference is rating: Ops Clock at 4.7 against Volume Calculator Pro's 4.0. Ops Clock also leads on in-app purchases (none vs 3) and update cadence (every 5 months vs every 31 months). On price, ratings volume, ads and monetization model 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. Volume Calculator Pro sells 3 in-app purchases, starting at $0.99 per 7 days. Ops Clock asks for nothing beyond the download.
Ops Clock holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 11 and 5 respectively.
Ops Clock ships an update every 5 months, Volume Calculator Pro every 31 months. The most recent releases landed on October 13, 2026 and October 3, 2026 respectively.
| Parameter | Ops Clock | Volume Calculator Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (11 ratings) — better | 4.0 (5 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 11 — better | 5 |
| Update frequency | Every 5 months — better | Every 31 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.2 — better |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | James Kretchmar | Anna Filobok |
Customer experience
Ops Clock
Volume Calculator Pro
In-app purchases
Ops Clock
No in-app purchases
Volume Calculator Pro
- Premium Access$0.997 Days
- Premium Access$1.991 Month
- Premium Access$5.991 Year
Questions
Is Ops Clock free?
Is Volume Calculator Pro free?
Which has better reviews, Ops Clock or Volume Calculator Pro?
Do Ops Clock or Volume Calculator Pro have ads?
Which is updated more often, Ops Clock or Volume Calculator Pro?
Other comparisons
