Comparison

Approximationist World Clock vs AutoCheck OBD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Approximationist World Clock

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
Read full description

Approximationist: The Friendly World Clock for Humans Approximationist is a world clock app for people who don’t want to do timezone gymnastics before coffee. It helps you quickly understand what time it is around the world, with a fun approximation-first approach that answers the only question that matters: “Is now a good time?” Now with time slider, export/import and share of the teams' info (as sets) Need to coordinate New York, London, and Tokyo? Approximationist lets you compare cities at a glance and translate your local time into theirs without melting your brain. What makes it different World clock, but chill: Track multiple cities and time zones in one clean view. Approximation that helps: See rough equivalents fast when exact minutes aren’t the point. Quick overlap spotting: Find windows when everyone is probably awake and responsive. Human-friendly timing: Think in “early morning,” “around lunch,” or “late evening,” not just raw offsets. Less math, more momentum: Spend less time converting, more time actually scheduling. Perfect for Remote teams spread across time zones Freelancers working with global clients Travelers planning across regions Friends and families who live far apart Anyone who has ever asked, “Wait… what time is it there again?” Approximationist keeps global time coordination simple, useful, and a little more fun. Because life is complicated enough without manually adding 9 hours in your head. Friendly disclaimer: Approximationist is made for quick, practical time estimates, not split-second precision. If you need exact precision, there are many beautiful apps on the App Store, please take a look at them. Introductory pricing note: Approximationist is currently available at a special launch price for early users.

About

AutoCheck OBD

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
Read full description

AutoCheck OBD turns your iPhone into a professional-grade OBD-II scanner. Connect any ELM327-compatible adapter over Wi-Fi or Bluetooth and see what your car's computer is really doing — in real time. DIAGNOSE THE CHECK ENGINE LIGHT • Read and clear diagnostic trouble codes (DTCs) • Clear, plain-language descriptions with likely causes and symptoms • Freeze-frame data captured at the moment the fault occurred LIVE ENGINE DATA • RPM, speed, coolant temperature, engine load and throttle position • Fuel level, intake air temperature, MAF, timing advance and more • A clean, easy-to-read dashboard that updates as you drive BUILT FOR EVERY DRIVER • Works with inexpensive ELM327 Wi-Fi and Bluetooth adapters • Share a complete diagnostic report as a PDF • Demo Mode lets you explore every feature with no adapter connected • Available in 11 languages, matching your device automatically Whether you're inspecting a used car, chasing down a warning light, or just curious about what's under the hood, AutoCheck OBD gives you real answers — no expensive shop tools required. Note: Requires an ELM327-compatible OBD-II adapter (sold separately).

Screenshots

Approximationist World Clock4 screens
AutoCheck OBD4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
Approximationist World Clock versus AutoCheck OBD: the parameters behind the verdict, then further details
ParameterApproximationist World ClockAutoCheck OBD
Price$0.99Free — better
Rating5.0 (2 ratings) — better4.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better18.1
Further details — not scored
Size2 MB4 MB
Age rating4+12+
DeveloperSimply Useful AppsSubin Revi

Customer experience

Approximationist World Clock

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

AutoCheck OBD

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Approximationist World Clock

No in-app purchases

None

AutoCheck OBD

No in-app purchases

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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