# Ops Clock vs ResToolbox3

The clearest difference is update cadence: ResToolbox3 at every 6 days against Ops Clock's every 5 months. ResToolbox3 also leads on rating (5.0 vs 4.7). Ops Clock's advantage is ratings volume (11 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ResToolbox3 holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Ops Clock has 11 ratings behind it against 2, so its average is the more settled of the two.

Ops Clock ships an update every 5 months, ResToolbox3 every 6 days. The most recent releases landed on September 28, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Ops Clock | ResToolbox3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (11 ratings)](https://appshunter.io/ios/app/ops-clock/id1352786229/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/restoolbox3/id6759464322/reviews)** |
| Number of ratings | **11** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 days** |
| Monetization | Free | Free |
| Size | 2 MB | 25 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [James Kretchmar](https://appshunter.io/developer/1352786228) | [MobileReservoir](https://appshunter.io/developer/497057811) |

## What reviewers say

### Ops Clock

[App page](https://appshunter.io/ios/app/ops-clock/id1352786229)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


### ResToolbox3

[App page](https://appshunter.io/ios/app/restoolbox3/id6759464322)

This petroleum engineering calculator provides rapid answers for engineers in the field or office. It offers comprehensive tools for fluid properties, gas hydrate prediction, nodal analysis, production forecasting, volumetrics, and well testing, all accessible offline.

**Highlights:** Fluid properties (PVT) analysis, Gas hydrate prediction, Nodal analysis for wells, Production forecasting, Volumetric calculations, Well test analysis, Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Ops Clock free?

Ops Clock is free to download, with no in-app purchases.

### Is ResToolbox3 free?

ResToolbox3 is free to download, with no in-app purchases.

### Which has better reviews, Ops Clock or ResToolbox3?

ResToolbox3 is rated higher. Ops Clock averages 4.7 out of 5 from 11 ratings, while ResToolbox3 averages 5.0 from 2 ratings.

### Do Ops Clock or ResToolbox3 have ads?

Neither Ops Clock nor ResToolbox3 shows ads.

### Which is updated more often, Ops Clock or ResToolbox3?

Ops Clock ships an update every 5 months, and ResToolbox3 every 6 days. Most recently, Ops Clock was updated on September 28, 2026 and ResToolbox3 on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*