Member Avatar for jhonlipsa

It is not easy to find an unit converter application which is the best. I am simply looking for an app (iPhone) where I can decide what units are shown to me, with or without internet connection, no ad, favorites, easy to use, clean user interface and free is better but can spend up to 2 dollars. Let me know if you are aware of any good ones with positive feedback and it will be awesome if you are that app user yourself.

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  • Latest Post Latest Post by Kelly Burby

Dani AI

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asked for a simple, offline, ad‑free iPhone converter with favorites and the ability to pick which units show. and pointed to quick options and web search as starting points. Because app availability and quality change over time, the most reliable route is a short checklist plus a few hands‑on tests before committing to a download or purchase.

  • Check offline scope: most physical-unit conversions (length, mass, temp) work entirely offline. Currency and live-rate conversions require network access or a built‑in rate cache—expect stale results if offline.
  • Customization: look for “favorites”, the ability to hide/reorder units, and support for user‑defined units if needed.
  • Ads and purchases: confirm whether the app is ad‑free or uses a one‑time unlock; read the “In‑App Purchases” and recent reviews.
  • Maintenance and compatibility: prefer apps updated in the past year and compatible with your iOS version; abandoned apps often break on newer iOS.
  • Coverage & accuracy: verify it contains the specific units you use (engineering/rare units) and shows enough decimal precision.

Quick test sequence to run on any candidate app

  • Read the App Store description and recent reviews, then install a free version or trial.
  • Turn on Airplane Mode and try conversions across categories to confirm true offline behavior.
  • Add a favorite, hide or reorder a unit, quit the app, and relaunch to ensure settings persist.
  • Try a few known conversions (for example 1 inch = 25.4 mm) to spot rounding or accuracy issues.
  • Watch for popup ads or nag screens within a few minutes of use.

If nothing on the store meets this checklist, consider building a tiny iOS Shortcut or spreadsheet for the few conversions you use most—fully offline and tailored.

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Member Avatar for CimmerianX

There are dozens.

I use one called simply 'Unit Converter'. No ads, free, works well.

Member Avatar for Kelly Burby

Well, I wouldn't know much about an app made for this I guess most of the time I use to sort this problem out just by using Google.

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