# Lettermen's Propane KC vs Smartgyro CORE

The clearest difference is update cadence: Smartgyro CORE at every 5 weeks against Lettermen's Propane KC's every 4 months. Lettermen's Propane KC's advantage is iOS requirement (12.2 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Lettermen's Propane KC ships an update every 4 months, Smartgyro CORE every 5 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Lettermen's Propane KC | Smartgyro CORE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 56 MB | 46 MB |
| Requires iOS | **12.2** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) | [Changzhou Taochen Electronic Technology Co., Ltd.](https://appshunter.io/developer/1605293756) |

## What reviewers say

### Lettermen's Propane KC

[App page](https://appshunter.io/ios/app/lettermens-propane-kc/id6444366472)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smartgyro CORE

[App page](https://appshunter.io/ios/app/smartgyro-core/id6673902672)

This app provides comprehensive control and management for electric scooters. Users can customize settings, track distance and battery status, and secure their scooter with remote lock/unlock features. It enhances the riding experience with features like cruise control and ensures the app is always up-to-date.

**Highlights:** Customize scooter lights, Real-time distance tracking, Monitor battery status, Remote lock and unlock, Cruise control activation, App updates

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

**In-app purchases:** none


## Frequently asked questions

### Is Lettermen's Propane KC free?

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

### Is Smartgyro CORE free?

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

### Do Lettermen's Propane KC or Smartgyro CORE have ads?

Neither Lettermen's Propane KC nor Smartgyro CORE shows ads.

### Which is updated more often, Lettermen's Propane KC or Smartgyro CORE?

Lettermen's Propane KC ships an update every 4 months, and Smartgyro CORE every 5 weeks. Most recently, Lettermen's Propane KC was updated on October 27, 2026 and Smartgyro CORE on October 24, 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.*