# DENSO Spark Plugs vs ChaReader

The clearest difference is update cadence: ChaReader at every 2 months against DENSO Spark Plugs's every 15 months. DENSO Spark Plugs's advantage is review sentiment (100% vs 83%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DENSO Spark Plugs holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 23 and 8 respectively. Written reviews point the same way: 100% of DENSO Spark Plugs's written reviews are positive against 83% of ChaReader's.

DENSO Spark Plugs ships an update every 15 months, ChaReader every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | DENSO Spark Plugs | ChaReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (23 ratings)](https://appshunter.io/ios/app/denso-spark-plugs/id1499244061/reviews)** | [4.5 (8 ratings)](https://appshunter.io/ios/app/chareader/id1531941930/reviews) |
| Number of ratings | **23** | 8 |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 14 MB | 3 MB |
| Requires iOS | **14** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Nikaan Nikzad](https://appshunter.io/developer/1465623388) | [Kuixi Song](https://appshunter.io/developer/1052013882) |

## What reviewers say

### DENSO Spark Plugs

[App page](https://appshunter.io/ios/app/denso-spark-plugs/id1499244061)

Find the correct DENSO spark plug for your car by selecting your vehicle model. This app serves as a reference for car owners, mechanics, and sellers to identify suitable spark plug part numbers and their compatibility with various car brands.

**Highlights:** Identify suitable spark plug part numbers, Search by car model, Reference for mechanics, Reference for sellers, Supports numerous car brands

**Features:** macOS Compatibility

**In-app purchases:** none


### ChaReader

[App page](https://appshunter.io/ios/app/chareader/id1531941930)

Convert text from various sources into spoken word. Save articles as audio or PDF, and extract key information. Personalize your reading experience with adjustable voice settings and display options.

**Highlights:** Import articles from web, documents, images (OCR), Read articles aloud with adjustable voice settings, Export audio to MP3, Export articles to PDF, Extract key information (email, links, phone), Save favorite sentences to Collections

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DENSO Spark Plugs free?

DENSO Spark Plugs is free to download, with no in-app purchases.

### Is ChaReader free?

ChaReader is free to download, with no in-app purchases.

### Which has better reviews, DENSO Spark Plugs or ChaReader?

DENSO Spark Plugs is rated higher. DENSO Spark Plugs averages 4.7 out of 5 from 23 ratings, while ChaReader averages 4.5 from 8 ratings.

### Do DENSO Spark Plugs or ChaReader have ads?

Neither DENSO Spark Plugs nor ChaReader shows ads.

### Which is updated more often, DENSO Spark Plugs or ChaReader?

DENSO Spark Plugs ships an update every 15 months, and ChaReader every 2 months. Most recently, DENSO Spark Plugs was updated on November 3, 2026 and ChaReader on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*