# Salley's Propane vs Flashcal+

The clearest difference is in-app purchases: Salley's Propane at none against Flashcal+'s 5. Salley's Propane also leads on device support (3 vs 1) and iOS requirement (12.2 vs 16.0). Flashcal+'s advantage is update cadence (every 3 weeks vs every 8 months). On price and ads there is nothing between them.

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

Salley's Propane ships an update every 8 months, Flashcal+ every 3 weeks. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Salley's Propane | Flashcal+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (6 ratings)](https://appshunter.io/ios/app/flashcal-plus/id6739143913/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 56 MB | 124 MB |
| Requires iOS | **12.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) | [Holley Performance Products](https://appshunter.io/developer/1175069390) |

## What reviewers say

### Salley's Propane

[App page](https://appshunter.io/ios/app/salleys-propane/id6449983559)

**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 Salley's Propane free?

Salley's Propane is free to download, with no in-app purchases.

### Is Flashcal+ free?

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

### Do Salley's Propane or Flashcal+ have ads?

Neither Salley's Propane nor Flashcal+ shows ads.

### Which is updated more often, Salley's Propane or Flashcal+?

Salley's Propane ships an update every 8 months, and Flashcal+ every 3 weeks. Most recently, Salley's Propane was updated on October 14, 2026 and Flashcal+ on October 12, 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.*