# Hybrid Service Essentials App — HV Battery, Brake & OBD Tools

> HV Battery, Brake & OBD Tools (iPhone/iPad app by ChatStick Company Limited.)

- Source: https://appshunter.io/ios/app/hybrid-service-essentials-app/id6787367987 (this page in markdown: same URL + `.md`)
- Developer: [ChatStick Company Limited](https://appshunter.io/developer/1165816085)
- Category: Utilities, Reference
- Price: $4.99
- Age rating: 4+
- Requires: iOS 26.0 · 21 MB
- Languages: American English
- Released: 2026-07-15
- Data updated: 2026-08-02
- User reviews in markdown: https://appshunter.io/ios/app/hybrid-service-essentials-app/id6787367987/reviews.md

## What is Hybrid Service Essentials App?

Hybrid Service Essentials is a shop-floor toolkit for diagnosing and repairing aging hybrid vehicles — built for independent technicians and hands-on DIYers working on out-of-warranty Toyota, Honda, and Ford hybrids.

This is a TOOL app, not just a book. Five interactive calculators turn the hard calls into fast, confident answers:

• HV Battery Health Estimator — enter module readings and get an estimated pack health with a clear rebuild-vs-replace verdict.
• Repair Cost Estimator — compare rebuild, remanufactured, and dealer options with a return-on-value read.
• Regen Brake Wear — predict pad life from mileage and duty cycle, and know when to inspect rotors.
• Inverter Coolant Service — track the 100k-mile interval and follow the bleed procedure step by step.
• 12V Battery Check — convert resting voltage to state of charge and get a replace-or-keep call.

Everything works fully offline. No account. No subscription. No ads.

MORE THAN CALCULATORS
• Service Checklist — a repeatable, phase-by-phase hybrid job from intake to road test, with progress saved automatically.
• Quizzes — 60 questions across 12 chapters with instant feedback and plain-language explanations.
• Glossary — quick definitions for the codes, components, and acronyms you meet on the bench.
• Progress & Achievements — track reading, service, and quiz progress and unlock badges as you go.

THE FULL REFERENCE, INCLUDED
As a bonus, the complete illustrated guide is bundled inside — every chapter and diagram, readable offline with adjustable text size, bookmarks, and resume.

BUILT FOR THE BAY
• iPhone and iPad
• 100% offline — nothing leaves your device
• No sign-in, no tracking, no ads

Whether you're quoting a high-voltage battery, chasing a no-start, or deciding rebuild vs replace, Hybrid Service Essentials gives you the numbers and the procedures to work faster and quote with confidence.


## Version history (last 1 release)

### 1.0 — 2026-07-15

No release notes.

## More apps by ChatStick Company Limited

- [Nong-ma-feang Stickers for iMessage Free](https://appshunter.io/ios/app/nong-ma-feang-stickers-for-imessage-free/id1165816086)
- [Kam-Muang Vol.1 Stickers for iMessage](https://appshunter.io/ios/app/kam-muang-vol1-stickers-for-imessage/id1166410690)
- [3Kingdoms Stickers for iMessage](https://appshunter.io/ios/app/3kingdoms-stickers-for-imessage/id1166473908)
- [Flower Emoji Stickers Keyboard Themes ChatStick](https://appshunter.io/ios/app/flower-emoji-stickers-keyboard-themes-chatstick/id1167804760)
- [Happy Birthday Stickers by CS](https://appshunter.io/ios/app/happy-birthday-stickers-by-cs/id1169302812)
- [Military Stickers by ChatStick](https://appshunter.io/ios/app/military-stickers-by-chatstick/id1171599782)

All apps by ChatStick Company Limited: https://appshunter.io/developer/1165816085

---

*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 2026-08-02.*