Comparison

NISTM vs API 571 Helpmate

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

Head to head
About

NISTM

This platform connects professionals in the aboveground storage tank industry with the latest services, products, and technologies. It has been a leading resource for industry insights since 1989.

Highlights
  • Industry-specific services
  • Latest products and technology
  • Professional networking
  • Resource discovery
  • Industry insights
Features
Read full description

Since 1989, the National Institute of Storage Tank Management (NISTM) has been the go-to platform for aboveground storage tank professionals to discover the industry's latest services, products, and technology.

About

API 571 Helpmate

Features
Read full description

Prepare for your API 571 Corrosion and Materials certification with API 571 Helpmate, the ultimate study companion. This app provides the essential knowledge base for the current Body of Knowledge (BOK), ensuring you're fully up-to-date on the latest requirements. With over 500 questions, API 571 Helpmate offers powerful features designed to optimize your study experience. Track your progress, bookmark challenging questions, and tailor your learning to your individual needs. This allows you to pinpoint areas for improvement and solidify your understanding of critical concepts. Study anytime, anywhere, and build the confidence you need to ace your exam. API 571 Helpmate is built to help engineers, inspectors, and beginners achieve success, empowering you to learn without barriers. What You'll Gain: • Accelerated Learning: Quickly grasp engineering codes and standards used in the petroleum and petrochemical industries. • Exam Readiness: Develop a deeper understanding of API 571 certification exam questions and gain real-life exam experience. • Up-to-Date Content: Access the latest API 571 Body of Knowledge (BOK) requirements. • Increased Confidence: Boost your confidence for the actual exam and significantly improve your chances of passing. • Efficient Preparation: Maximize your success on your first attempt while minimizing the impact on your working schedule. • Flexible Study: Enjoy 24/7 access to learn at your own pace, place, and convenience. • Cross-Platform Access: Study seamlessly from your tablet or smartphone. • Cost Savings: Eliminate dependency on expensive API 571 exam preparation classroom courses. • Categorized Questions: Explore questions from the API RP 571 Body of Knowledge (BOK) grouped by: o Low-Temperature Corrosion o Elevated-Temperature Corrosion o Metallurgical and Mechanical Damage o Environment-Assisted Cracking o Other Mechanisms Important Notes: • While this app does not contain actual exam questions (as they frequently change), it provides an abundance of frequently asked or similar questions to prepare you thoroughly. • API 571 Helpmate cannot grant you API certification. However, it is an invaluable tool for engineers, engineering students, and designers to quickly learn the industry's essential codes and standards. Developed by Experts: This app is developed by authorized API certified inspectors who achieved success through a systematic self-learning approach, without relying on classroom or online courses. We believe in your potential and encourage you to begin your learning journey with API 571 Helpmate today. Every step you take will make you stronger, more skilled, more self-confident, and ultimately more successful. For more information, please visit https://engqa.com EULA : https://helpmateworld.com/about-us/

Screenshots

NISTM4 screens
API 571 Helpmate4 screens

Verdict

The call

The clearest difference is in-app purchases: NISTM at none against API 571 Helpmate's 1. NISTM also leads on update cadence (every 3 months vs every 8 months) and iOS requirement (12.0 vs 16.0). On price, ads 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

Both are free to download. API 571 Helpmate sells 1 in-app purchase, starting at $29.00 per year. NISTM asks for nothing beyond the download.

UpkeepUpdate frequency

NISTM ships an update every 3 months, API 571 Helpmate every 8 months. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 6 level
NISTM versus API 571 Helpmate: the parameters behind the verdict, then further details
ParameterNISTMAPI 571 Helpmate
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 months — betterEvery 8 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size84 MB34 MB
Age rating4+4+
DevelopervFairs LLCAustenite Pty Ltd

In-app purchases

None

NISTM

No in-app purchases

1 purchases

API 571 Helpmate

Subscriptions1
  • 12 Months Plan$29.001 Year

Questions

Is NISTM free?
NISTM is free to download, with no in-app purchases.
Is API 571 Helpmate free?
API 571 Helpmate is free to download, with in-app purchases available.
Do NISTM or API 571 Helpmate have ads?
Neither NISTM nor API 571 Helpmate shows ads.
Which is updated more often, NISTM or API 571 Helpmate?
NISTM ships an update every 3 months, and API 571 Helpmate every 8 months. Most recently, NISTM was updated on October 8, 2026 and API 571 Helpmate on October 15, 2026.

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