# Ops Clock vs Max Calc

The clearest difference is in-app purchases: Ops Clock at none against Max Calc's 2. Ops Clock also leads on ratings volume (11 vs 1) and iOS requirement (15.0 vs 17.0). Max Calc's advantage is update cadence (every 9 days vs every 5 months) and rating (5.0 vs 4.7). On price, review sentiment, ads and monetization model there is nothing between them.

Both are free to download. Max Calc sells 2 one-off in-app purchases. Ops Clock asks for nothing beyond the download.

Max Calc 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 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Ops Clock ships an update every 5 months, Max Calc every 9 days. The most recent releases landed on August 25, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | Ops Clock | Max Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (11 ratings)](https://appshunter.io/ios/app/ops-clock/id1352786229/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/max-calc/id6463495098/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 2 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [James Kretchmar](https://appshunter.io/developer/1352786228) | [Anatolii Mazkun](https://appshunter.io/developer/1697280298) |

## 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


### Max Calc

[App page](https://appshunter.io/ios/app/max-calc/id6463495098)

This app offers a versatile calculation suite, combining standard, scientific, developer, and accounting functions. It also includes a unit converter and tools for health and date calculations, all within a user-friendly interface.

**Highlights:** Standard and Scientific Calculator, Developer Calculator (hex, binary), Accounting Calculator, 130+ Unit Converter, Body and Date/Time Calculator, History tracking, Customizable result formatting

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 days Free Using  All Premium | Free | one-time |
| Premium features | $4.99 | one-time |


## Frequently asked questions

### Is Ops Clock free?

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

### Is Max Calc free?

Max Calc is free to download, with in-app purchases available.

### Which has better reviews, Ops Clock or Max Calc?

Max Calc is rated higher. Ops Clock averages 4.7 out of 5 from 11 ratings, while Max Calc averages 5.0 from 1 ratings.

### Do Ops Clock or Max Calc have ads?

Neither Ops Clock nor Max Calc shows ads.

### Which is updated more often, Ops Clock or Max Calc?

Ops Clock ships an update every 5 months, and Max Calc every 9 days. Most recently, Ops Clock was updated on August 25, 2026 and Max Calc on June 4, 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.*