# Approximationist World Clock vs AutoCheck OBD

The clearest difference is price: AutoCheck OBD at Free against Approximationist World Clock's $0.99. Approximationist World Clock's advantage is rating (5.0 vs 4.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

AutoCheck OBD is free to download; Approximationist World Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Approximationist World Clock holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Approximationist World Clock | AutoCheck OBD |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/approximationist-world-clock/id6762967230/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/autocheck-obd/id6771629013/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 2 MB | 4 MB |
| Requires iOS | **17.0** | 18.1 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Simply Useful Apps](https://appshunter.io/developer/321416742) | [Subin Revi](https://appshunter.io/developer/1694863615) |

## What reviewers say

### Approximationist World Clock

[App page](https://appshunter.io/ios/app/approximationist-world-clock/id6762967230)

This app simplifies understanding global time zones with a focus on approximations rather than exact minutes. It helps users quickly see if a time is suitable for others worldwide, making coordination easier for remote teams, travelers, and families.

**Highlights:** Approximation-first time zone display, Compare multiple cities at a glance, Quick overlap spotting for availability, Human-friendly time descriptions, Time slider functionality, Export/import and share team info

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

**In-app purchases:** none


### AutoCheck OBD

[App page](https://appshunter.io/ios/app/autocheck-obd/id6771629013)

Transform your iPhone into a professional OBD-II scanner. Read and clear diagnostic trouble codes with plain-language explanations, view live engine data in real-time, and generate comprehensive diagnostic reports. Explore all features with a demo mode before connecting an adapter.

**Highlights:** Read and clear DTCs, Plain-language code descriptions, Live engine data dashboard, Freeze-frame data capture, Shareable PDF diagnostic reports, Demo Mode for exploration, Multi-language support

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

**In-app purchases:** none


## Frequently asked questions

### Is Approximationist World Clock free?

Approximationist World Clock costs $0.99, with no in-app purchases.

### Is AutoCheck OBD free?

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

### Which has better reviews, Approximationist World Clock or AutoCheck OBD?

Approximationist World Clock is rated higher. Approximationist World Clock averages 5.0 out of 5 from 2 ratings, while AutoCheck OBD averages 4.0 from 1 ratings.

### Do Approximationist World Clock or AutoCheck OBD have ads?

Neither Approximationist World Clock nor AutoCheck OBD shows ads.

### Which is updated more often, Approximationist World Clock or AutoCheck OBD?

Approximationist World Clock ships an update every 2 months, and AutoCheck OBD every 2 months. Most recently, Approximationist World Clock was updated on October 6, 2026 and AutoCheck OBD on October 12, 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.*