# API Inspector Cert Prep — 510, 570 & 653 exam practice

> 510, 570 & 653 exam practice (iPhone/iPad app by Simon Shih.)

- Source: https://appshunter.io/ios/app/api-inspector-cert-prep/id6785875538 (this page in markdown: same URL + `.md`)
- Developer: [Simon Shih](https://appshunter.io/developer/1870707682)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 31 MB
- Languages: American English
- Released: 2026-07-07
- Data updated: 2026-08-05
- User reviews in markdown: https://appshunter.io/ios/app/api-inspector-cert-prep/id6785875538/reviews.md

## What is API Inspector Cert Prep?

API Inspector Cert Prep helps you study for the API individual certification exams — 510 (Pressure Vessel), 570 (Piping), and 653 (Aboveground Storage Tank) — with a large bank of exam-style practice questions and realistic timed mock exams.
Each certification is its own module you can unlock, built from that exam's published Body of Knowledge and the codes and recommended practices it references.
WHAT'S INSIDE

API 510 – Pressure Vessel Inspector: 323 questions
API 570 – Piping Inspector: 291 questions
API 653 – Aboveground Storage Tank Inspector: 251 questions

PRACTICE THE WAY YOU LEARN

- Practice mode covers the whole module, ordered to surface your weak areas first
- Drill any single topic on its own
- Every question includes a worked explanation with the relevant code reference
- Timed mock exams mirror exam-day pace, with a running clock and a scored result

TRACK YOUR READINESS

- Per-topic and overall readiness show exactly where you stand
- Spaced-repetition scheduling brings back what you keep missing
- Review any missed question, and save the tricky ones for later
- Exam history keeps a record of your past mock exams

PLAN AROUND YOUR TEST DATE

- Set your exam date and get a daily target to cover the bank in time
- See days remaining and current readiness at a glance

BUILT TO JUST WORK

- No account, no login — everything stays on your device
- Works fully offline; the only network use is purchases
- Light, dark, and system themes

Buy only the modules you need. A free sample of each module is available before you unlock it.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| API 510 – Pressure Vessel Inspector | $19.99 | one-time |
| API 570 – Piping Inspector | $19.99 | one-time |
| API 653 – Storage Tank Inspector | $19.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-07

No release notes.

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All apps by Simon Shih: https://appshunter.io/developer/1870707682

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-05.*