Comparison

Study Guide Pro vs Contactor

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

Head to head
About

Study Guide Pro

Create and review custom study guides for any subject. Organize questions and answers, randomize them for practice, and access your guides on your Apple Watch. Perfect for preparing for quizzes, tests, and certifications.

Highlights
  • Create custom study guides
  • Add questions and answers
  • Randomize question order
  • Create multiple guides
  • Edit existing entries
  • Apple Watch integration
Features
Read full description

Study Guide Pro helps you study for anything. From quizzes, tests, exams, certifications, etc. You just need to: * Give your study guide a name * Enter your questions and answers My Study Guide Po will help you review everything you entered into it. Study Guide Pro allows you to: * Randomize your question/answers * Create multiple study guides * Edit questions/answers as many times as you need to * Browse your study guides easily on your Apple Watch Please contact us using the support link below for any errors/bugs/feature requests.

About

Contactor

This app connects HVAC technicians with local suppliers, offering real-time refrigerant pricing, appointment booking, and a community forum. It streamlines daily tasks for professionals by providing essential tools and information in one place.

Highlights
  • Live refrigerant pricing lookup
  • Supplier map & contact profiles
  • Easy appointment scheduling
  • HVAC technician forum
  • Tools, reminders & calculators
Features
Read full description

HVAC tools for the work in front of you. Compare listed refrigerant prices, find suppliers and keep your field information together in Contactor. CALCULATE WITH CLEAR INPUTS Open calculators for superheat, subcooling, airflow, static pressure, electrical values and unit conversions. See the inputs, units and results so you can review each calculation in context. Check assumptions and follow the equipment documentation for the job. FIND SUPPLIERS AND LISTED PRICES Browse nearby supplier information and compare published R-22 and R-410A quotes. Supplier coverage varies by location; listed prices and availability depend on the information provided and may change. Pickup requests are available only with participating suppliers that support bookings. Confirm details directly with the supplier. LEARN AND FIND REFERENCE MATERIAL School brings guided HVAC lessons, explanatory quizzes and EPA Section 608 practice questions. EPA material focuses on United States requirements; practice does not issue certification or replace an approved exam. The manual library shows model, region and revision details with source links; check that a document applies to your equipment. KEEP FIELD WORK ORGANIZED Use equipment records, visit drafts, readings, checklists and service notes in Field desk. Prepared offline copies require setup beforehand. Keep the details you need for a later visit together instead of relying on memory. ASK AND DISCUSS Optional AI Support can help structure a question about symptoms, models and readings. It requires a connection, relevant access and consent; answers can be wrong. The forum provides a place for questions and field discussions. BEFORE YOU START The interface shown is in English; some content may be available in other languages. A translated store listing does not mean every in-app screen or feature is translated. Optional paid features show available prices and terms before purchase. Use appropriate safety procedures and qualified professional judgment. Support: support@decodation.com Support: https://contactor-h-v-a-c-porta-monv1g.web.app/legal/support/ Privacy: https://contactor-h-v-a-c-porta-monv1g.web.app/legal/privacy/ Terms: https://contactor-h-v-a-c-porta-monv1g.web.app/legal/terms/

Screenshots

Study Guide Pro4 screens
Contactor4 screens

Verdict

The call

The clearest difference is review sentiment: Contactor at 100% against Study Guide Pro's 0%. Contactor also leads on price (Free vs $2.99) and rating (5.0 vs 4.0). Study Guide Pro's advantage is in-app purchases (none vs 2) and update cadence (every 2 months vs every 7 months). On ratings volume, ads, device support and iOS requirement 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

Contactor is free to download; Study Guide Pro costs $2.99 up front. Contactor sells 2 in-app purchases, starting at $9.99 per month. Study Guide Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Contactor holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 0% of Study Guide Pro's written reviews are positive against 100% of Contactor's.

UpkeepUpdate frequency

Study Guide Pro ships an update every 2 months, Contactor every 7 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
Study Guide Pro versus Contactor: the parameters behind the verdict, then further details
ParameterStudy Guide ProContactor
Price$2.99Free — better
Rating4.0 (2 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings22
Update frequencyEvery 2 months — betterEvery 7 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.615.0.0 — better
Further details — not scored
Size2 MB107 MB
Age rating4+4+
DeveloperPablo AristaDECODATION

Customer experience

Study Guide Pro

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Contactor

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Study Guide Pro

No in-app purchases

2 purchases

Contactor

Subscriptions2
  • Contactor HVAC App: Monthly$9.991 Month
  • Contactor HVAC App: Annual$59.991 Year

Questions

Is Study Guide Pro free?
Study Guide Pro costs $2.99, with no in-app purchases.
Is Contactor free?
Contactor is free to download, with in-app purchases available.
Which has better reviews, Study Guide Pro or Contactor?
Contactor is rated higher. Study Guide Pro averages 4.0 out of 5 from 2 ratings, while Contactor averages 5.0 from 2 ratings.
Do Study Guide Pro or Contactor have ads?
Neither Study Guide Pro nor Contactor shows ads.
Which is updated more often, Study Guide Pro or Contactor?
Study Guide Pro ships an update every 2 months, and Contactor every 7 months. Most recently, Study Guide Pro was updated on November 1, 2026 and Contactor on October 30, 2026.

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