# Spark Plug Reader — Read it, don't replace it

> Read it, don't replace it (iPhone/iPad app by EVREN YUCEBAS.)

- Source: https://appshunter.io/ios/app/spark-plug-reader/id6805215335 (this page in markdown: same URL + `.md`)
- Developer: [EVREN YUCEBAS](https://appshunter.io/developer/6782353474)
- Category: Utilities, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 37 MB
- Languages: American English
- Released: 2026-09-16
- Data updated: 2026-10-06
- User reviews in markdown: https://appshunter.io/ios/app/spark-plug-reader/id6805215335/reviews.md

## What is Spark Plug Reader?

Plug Read turns a spark plug into a diagnosis, and now it torques the replacement in correctly too.

MATCHED BY EYE, NOT BY PART NUMBER
Eight appearances, drawn as they come out of an engine. Tap the match and you get what it means and what to check, in the order worth checking it.

INSTALL TORQUE, BY THREAD AND SEAT
Pick the thread size and seat type, the head material, and get the torque range in both ft-lb and Nm, plus the hand-tight-and-turn fallback for when you do not have a torque wrench. Cross a plug wrong and you either strip the threads or leave it loose enough to blow out under compression, and the difference between right and wrong can be as little as five foot-pounds.

THE PLUG IS THE CHEAPEST WINDOW INTO AN ENGINE
Five minutes with a plug spanner tells you more about mixture, timing and oil control than an hour of guessing.

NO PART NUMBERS, NO DATABASE
Nothing here goes out of date, because it works from the plug in your hand and the thread you are installing into rather than a list of engine models.

WORKS OFFLINE
No account, no signal.

The torque table is a published general reference cross-checked across several independent sources, not a measured specification for any specific engine. Manufacturer torque specification always takes precedence.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Version | $4.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-09-18

Refreshed screenshots and minor presentation improvements. No changes to how the app works.

### 1.0 — 2026-09-16

No release notes.

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## More apps by EVREN YUCEBAS

- [Calm Breath – Anxiety Relief](https://appshunter.io/ios/app/calm-breath-anxiety-relief/id6782353472)
- [TinniCalm – Tinnitus Relief](https://appshunter.io/ios/app/tinnicalm-tinnitus-relief/id6782405638)
- [EyeCalm - Eye Strain Relief](https://appshunter.io/ios/app/eyecalm-eye-strain-relief/id6782910087)
- [HydroCalm](https://appshunter.io/ios/app/hydrocalm/id6785301291)
- [SleepCalm - Sleep Sounds](https://appshunter.io/ios/app/sleepcalm-sleep-sounds/id6785368361)
- [PostureCalm](https://appshunter.io/ios/app/posturecalm/id6785854829)

All apps by EVREN YUCEBAS: https://appshunter.io/developer/6782353474

## Related topics

[denso spark plugs](https://appshunter.io/ios/topics/denso-spark-plugs) · [ngk spark plugs](https://appshunter.io/ios/topics/ngk-spark-plugs)

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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 2026-10-06.*