ELMCheck vs FlexPeak
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ELMCheck
Verify the authenticity and functionality of your OBD-II scanner. This app runs comprehensive tests on ELM327 commands to report supported features, ensuring safe and reliable use with your vehicle.
- Authenticity testing for OBD-II scanners
- Comprehensive ELM327 command test suite
- Reports actual supported features
- Ensures safe scanner usage
- Basic tests are free
- Unlock full suite with in-app purchase
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Check the authenticity of your OBD-II scanner with ELMCheck. Most OBD-II scanners on the market use some variation of ELM327, but did you know that many scanners use clones of the original ELM327? It can be hard to tell, because these clones will work well enough for basic use but fail in unexpected scenarios. This is where ELMCheck comes in. ELMCheck offers a comprehensive set of test cases that cover the entire documented set of ELM327 commands. Regardless of which version your scanner says it is, ELMCheck can provide a comprehensive report of the features that are actually supported. Get the confidence you need to use your OBD-II scanner on your vehicle safely. ELMCheck is free to run basic tests. An in-app purchase will unlock the full test suite.
FlexPeak
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FlexPeak helps PG&E Hourly Flex Pricing Pilot customers understand hourly electricity prices, plan energy use, and monitor performance over time. The PG&E Hourly Flex Pricing Pilot Program uses prices that can change throughout the day. FlexPeak gives you a clear way to view those prices, identify lower-cost and higher-cost hours, and make more informed decisions about when to use electricity. Features include: Hourly Price Chart View PG&E Hourly Flex Pricing data in an easy-to-read chart. Quickly see how prices change across the day and identify the best times to shift flexible energy use. Widgets Keep an eye on current pricing from your Home Screen or Lock Screen. EV Charging Calculator Estimate EV charging costs based on your battery level, target charge, charging speed, and current hourly prices. FlexPeak Pro helps you plan charging sessions around lower-cost periods. Usage Analysis Import your PG&E usage data and analyze how your electricity use lines up with hourly pricing. Review more than 7 days of usage analysis with FlexPeak Pro. Price Monitoring Check current and upcoming prices so you can stay aware of changing energy costs throughout the day. Custom Settings Configure your provider, rate plan, circuit ID, price offset, and price thresholds to match your setup. Tessie Integration Optionally connect FlexPeak to Tessie using your own Tessie API key to support sending your charge schedule to your car. Privacy-Focused Design FlexPeak is designed to process your settings, imported usage data, and analysis on your device. PG&E login happens through PG&E’s standard website, and imported usage files are analyzed locally. FlexPeak is useful for customers who want to better understand the PG&E Hourly Flex Pricing Pilot Program, plan EV charging, and evaluate how daily energy decisions affect costs. FlexPeak Pro FlexPeak Pro unlocks additional features, including the EV charging calculator and extended usage analysis beyond 7 days. Disclaimer FlexPeak is an independent app and is not affiliated with, endorsed by, or sponsored by PG&E, GridX, Tessie, or Tesla. PG&E is a trademark of Pacific Gas and Electric Company. Tesla is a trademark of Tesla, Inc. Other names and trademarks are the property of their respective owners.
Screenshots
Verdict
ELMCheck and FlexPeak are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. ELMCheck sells 1 one-off in-app purchase and FlexPeak sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | ELMCheck | FlexPeak |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 14 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Fearless design, LLC | Lucas Albert Dewey |
In-app purchases
ELMCheck
- Comprehensive testing$2.99
FlexPeak
- FlexPeak Pro$4.99









