# JKBlaster vs Flashcal+

The clearest difference is rating: JKBlaster at 4.0 against Flashcal+'s 2.3. JKBlaster also leads on in-app purchases (none vs 5) and device support (3 vs 1). Flashcal+'s advantage is review sentiment (50% vs 25%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Flashcal+ sells 4 one-off in-app purchases. JKBlaster asks for nothing beyond the download.

JKBlaster holds the better App Store score, 4.0 against 2.3. Both are backed by a comparable volume of ratings — 6 and 6 respectively. Written reviews complicate that: 25% of JKBlaster's written reviews are positive against 50% of Flashcal+'s, so the app with the better star average is not the one people write more warmly about.

JKBlaster ships an update every 5 weeks, Flashcal+ every 3 weeks. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | JKBlaster | Flashcal+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (6 ratings)](https://appshunter.io/ios/app/jkblaster/id1532787247/reviews)** | [2.3 (6 ratings)](https://appshunter.io/ios/app/flashcal-plus/id6739143913/reviews) |
| Number of ratings | 6 | 6 |
| Positive reviews | 25.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 145 MB | 124 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JND Collections, Inc](https://appshunter.io/developer/1534014356) | [Holley Performance Products](https://appshunter.io/developer/1175069390) |

## What reviewers say

### JKBlaster

[App page](https://appshunter.io/ios/app/jkblaster/id1532787247)

This utility app connects to a separate WiFi OBD2 device to modify calibrations and access live data for 2007-2018 Jeep JK vehicles. It allows for DTC scanning and viewing real-time vehicle information. The app can be browsed without the hardware.

**Highlights:** Modify vehicle calibrations, Access live features, DTC scanning, View live data, WiFi OBD2 device communication

**Features:** macOS Compatibility

**In-app purchases:** none


### Flashcal+

[App page](https://appshunter.io/ios/app/flashcal-plus/id6739143913)

This utility calibrates your Jeep Wrangler's speedometer after tire or gear changes. It offers TPMS adjustment and is designed for JK, JL, and JT models.

**Highlights:** Speedometer calibration, Tire size adjustment, Gear ratio adjustment, TPMS on/off, Supports JK, JL, JT models

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pedal Booster | $24.99 | one-time |
| Power Tuning | $124.99 | one-time |
| Features and Options | $124.99 | one-time |
| PCM Cross Ship | $274.99 | one-time |


## Frequently asked questions

### Is JKBlaster free?

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

### Is Flashcal+ free?

Flashcal+ is free to download, with in-app purchases available.

### Which has better reviews, JKBlaster or Flashcal+?

JKBlaster is rated higher. JKBlaster averages 4.0 out of 5 from 6 ratings, while Flashcal+ averages 2.3 from 6 ratings.

### Do JKBlaster or Flashcal+ have ads?

Neither JKBlaster nor Flashcal+ shows ads.

### Which is updated more often, JKBlaster or Flashcal+?

JKBlaster ships an update every 5 weeks, and Flashcal+ every 3 weeks. Most recently, JKBlaster was updated on September 16, 2026 and Flashcal+ on September 23, 2026.

---

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