Study Guide Pro vs Contactor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Create custom study guides
- Add questions and answers
- Randomize question order
- Create multiple guides
- Edit existing entries
- Apple Watch integration
Read full descriptionHide 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.
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.
- Live refrigerant pricing lookup
- Supplier map & contact profiles
- Easy appointment scheduling
- HVAC technician forum
- Tools, reminders & calculators
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | Study Guide Pro | Contactor |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.0 (2 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 2 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid — better | Subscription |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 107 MB |
| Age rating | 4+ | 4+ |
| Developer | Pablo Arista | DECODATION |
Customer experience
Study Guide Pro
Contactor
In-app purchases
Study Guide Pro
No in-app purchases
Contactor
- Contactor HVAC App: Monthly$9.991 Month
- Contactor HVAC App: Annual$59.991 Year
Questions
Is Study Guide Pro free?
Is Contactor free?
Which has better reviews, Study Guide Pro or Contactor?
Do Study Guide Pro or Contactor have ads?
Which is updated more often, Study Guide Pro or Contactor?
Other comparisons















