Comparison

Converter vs A/C Pro

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

Head to head
About

Converter

This comprehensive utility app offers a suite of 10 powerful conversion and calculation tools, including units, currency, scientific, and more. Designed by an engineer with decades of experience, it ensures accuracy and a user-friendly interface for a wide range of applications.

Highlights
  • Over 1700 units in 50+ categories
  • 160+ currencies supported
  • Hex-Decimal-Binary and IEEE754 converters
  • Scientific calculator with 38-digit precision
  • Amortization calculator
  • Reference charts and documents
  • Customizable unit lists and favorites
Features
Read full description

This app is a bundle of 10 great Converter & Calculator apps for one low price & more are under development: •Units Converter with over 1700 units in over 50 categories •Currency Converter with over 160 currencies •Hex-Decimal-Binary Converter •IEEE754 Floating Point Converter •Roman Numeral Converter •Drill Bit Conveter •Simple 4-Function Calculator •Scientific Converter with up to 38 digits of precision •Amortization Calculator •A Collection of Reference Charts & Documents Originally introduced in 2010 under the name of iGotCharts, this app originally contained a collection of reference charts and a modest units converter. However, it has grown to so much more since its introduction so we have changed its name to be more reflective of its full capabilities. ConvertCalc was designed and developed by a professional engineer with over 45 years of metrology experience which is reflected in the features, capabilities, and accuracy of this app. It also has a very simple and attractive user interface. You can easily disable units & charts you don't need and put them in whatever order best suits you, then save it as a favorite and quickly switch between your favorites and the app defaults. There is also a powerful search feature to simplify locating a unit of interest, regardless of category. ConvertCalc is ideal for use in the kitchen as well as for engineering, surveying & scientific applications and anything in-between. Our conversion factors are consistent with NIST publications as well as other standards agencies and organizations such as API, BIPM, IAU, IEEE, IEC, etc. Every unit is defined & described. Whimsical units & systems such as smoots, FFF (furlong-firkin-fortnight) units and the Potrzebie System of units are also included for academic usage. ConvertCalc uses 64-bit floating point math with a 52-bit significand, good for 15 significant digits of data presentation. We have developed advanced algorithms and proprietary conversion factors to maximize the computation accuracy. Where NIST or other agencies define an exact relationship between two units of measure, ConvertCalc will perform those calculations precisely without any rounding. Inexact conversions may have slight rounding in the 14th or 15th digit, which still provides at least 13 significant digits of accuracy. It also includes a Hex-Decimal-Binary Converter with IEEE754 floating point notation capability and a Roman Numeral Converter. It also includes a Simple, Scientific and Amortization Calculator. The Scientific Calculator utilizes 64-bit base-10 decimal math providing 38 digit results. General App Features: • Retina support for both iPad and iPhone • All orientations supported for all devices • Swipe gestures simplify navigation and minimize button clutter • Save favorites in any chart or unit category • Quickly alphabetize or enable/disable all items in a category • Reference charts and publications on a variety of topics • Currency converter with over 160 currencies • Extremely flexible units converter • Definitions & descriptions of every chart and unit • Print charts to Airprint printers • Email feedback or charts from within the app Units & Currency Converter Features: • Enter & convert data in decimal, scientific, or fractional numbers • Supports compound units (ft-in, st-lb-oz, hr-min-sec, etc.) • Quickly & easily adjust output mode & display precision • 64-bit math provides up to 15 significant digit conversions • Use thumbwheel picker or tabular list to view conversions • Indexed list of all individual units with powerful search feature • Attractive graphics help identify the units • Swipe up to update currency conversion rates • Tap the equal sign to quickly swap the from/to units • Tap the unit abbreviations for a description of that unit We welcome your suggestions for additional units, charts, or other features. .

About

A/C Pro

This app guides you through recharging your vehicle's air conditioning system with step-by-step instructions tailored to your specific car. It offers video tutorials, helps locate the low side pressure port, and provides essential vehicle specifications for a successful DIY recharge.

Highlights
  • Step-by-step vehicle-specific instructions
  • Bluetooth connectivity with Smartcharge™ gauge
  • Instructional videos
  • Low side port finder
  • A/C spec database
  • Troubleshooting guide
Features
Read full description

When the time comes to recharge your vehicle’s A/C, the A/C Pro® phone app is here to help you. Step by step instructions, specifically tailored to your vehicle, guide you through the process. From locating the low side pressure port to letting you know when the recharge is complete, the instructions are seamless and easy to follow. If you are using an A/C Pro® product with Smartcharge TM technology, the app will connect to the gauge via Bluetooth. The app then provides guided, adaptive, vehicle-specific instructions helping to eliminate guesswork. An integrated troubleshooting guide get back on track should the need arise. Don’t feel like reading instructions? Alternatively, the app also provides handy instructional videos that are also specific to your vehicle’s year, make and model to help guide you through the recharge process. Perhaps you just need help in locating the low side port. The app includes access to the low side port finder – a robust image database showing where low side ports reside for most vehicles. The App also provides access to the A/C spec database, which provides refrigerant and oil specifications and capacities by vehicle. And if you still need additional help using an A/C Pro® product, the app will connect you directly with our support team. Thank you for choosing A/C Pro for all of your Auto A/C needs.

Screenshots

Converter4 screens
A/C Pro4 screens

Verdict

The call

The clearest difference is review sentiment: Converter at 100% against A/C Pro's 27%. Converter also leads on rating (5.0 vs 2.1). A/C Pro's advantage is price (Free vs $2.99) and ratings volume (293 vs 3). On update cadence, ads, in-app purchases and device support 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

A/C Pro is free to download; Converter costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Converter holds the better App Store score, 5.0 against 2.1. That said, the two scores are not equally well evidenced: A/C Pro has 293 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Converter's written reviews are positive against 27% of A/C Pro's.

UpkeepUpdate frequency

Converter ships an update every 6 months, A/C Pro every 4 months. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

Scorecard5 real differences · 5 level
Converter versus A/C Pro: the parameters behind the verdict, then further details
ParameterConverterA/C Pro
Price$2.99Free — better
Rating5.0 (3 ratings) — better2.1 (293 ratings)
Positive reviews100.0% of reviews — better27.1% of reviews
Number of ratings3293 — better
Update frequencyEvery 6 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size74 MB192 MB
Age rating12+4+
DeveloperDohmann Engineering ServicesEnergizer

Customer experience

Converter

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

A/C Pro

All ratings293 ratings
Positive27.6%
Neutral2.4%
Negative70.0%
Written reviews140 reviews
Positive27.1%
Neutral2.1%
Negative70.7%

Bugs and requests

Converter

Not enough reviews yet to summarise bugs or requests.

A/C Pro

Reported bugs

3 issues
  • App crashes when trying to enter UPC code
  • Vehicle information not loading properly
  • Bluetooth connection issues

Requested features

3 requests
  • Option to bypass app and use analog gauge
  • More comprehensive vehicle database
  • Closed captions for instructional videos

In-app purchases

None

Converter

No in-app purchases

None

A/C Pro

No in-app purchases

Questions

Is Converter free?
Converter costs $2.99, with no in-app purchases.
Is A/C Pro free?
A/C Pro is free to download, with no in-app purchases.
Which has better reviews, Converter or A/C Pro?
Converter is rated higher. Converter averages 5.0 out of 5 from 3 ratings, while A/C Pro averages 2.1 from 293 ratings.
Do Converter or A/C Pro have ads?
Neither Converter nor A/C Pro shows ads.
Which is updated more often, Converter or A/C Pro?
Converter ships an update every 6 months, and A/C Pro every 4 months. Most recently, Converter was updated on October 3, 2026 and A/C Pro on October 19, 2026.

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