Kohler Diagnostic System vs Vanguard Lithium
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kohler Diagnostic System
This application connects to a wireless interface module to help diagnose issues with EFI engines. It requires a specific hardware module to function for engine troubleshooting.
- EFI engine diagnostics
- Wireless interface module connectivity
- Troubleshoot engine issues
- Requires specific hardware
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Use the Kohler Engine Diagnostic System app with your Kohler Wireless Interface Module to diagnose EFI engine issues. The required Kohler Wireless Interface Module can be purchased through Diagnostic Systems Associates or from your Kohler distributor.
Vanguard Lithium
This app connects wirelessly to compatible battery chargers, allowing users to view diagnostic information and configure settings. It also offers cloud connectivity for enhanced data management.
- Wireless Bluetooth Smart connection
- Display diagnostic information
- Configure battery chargers
- Cloud connectivity
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The Vanguard Lithium application interfaces wirelessly with Vanguard battery chargers over Bluetooth Smart. Key features: + Displays diagnostic information related to battery charges + Allows users to configure battery charges + Cloud connectivity
Screenshots
Verdict
The clearest difference is rating: Vanguard Lithium at 5.0 against Kohler Diagnostic System's 3.0. Kohler Diagnostic System's advantage is update cadence (every 3 months vs every 6 months) and ratings volume (11 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Vanguard Lithium holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Kohler Diagnostic System has 11 ratings behind it against 2, so its average is the more settled of the two.
Kohler Diagnostic System ships an update every 3 months, Vanguard Lithium every 6 months. The most recent releases landed on September 16, 2026 and June 4, 2026 respectively.
| Parameter | Kohler Diagnostic System | Vanguard Lithium |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (11 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 16.7% of reviews | — |
| Number of ratings | 11 — better | 2 |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 64 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Diagnostic Systems Associates Inc. | Lester Electrical |
Customer experience
Kohler Diagnostic System
Vanguard Lithium
In-app purchases
Kohler Diagnostic System
No in-app purchases
Vanguard Lithium
No in-app purchases
Questions
Is Kohler Diagnostic System free?
Is Vanguard Lithium free?
Which has better reviews, Kohler Diagnostic System or Vanguard Lithium?
Do Kohler Diagnostic System or Vanguard Lithium have ads?
Which is updated more often, Kohler Diagnostic System or Vanguard Lithium?
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