PerfectPower vs Dyno Chart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PerfectPower
This app provides professional-grade automotive power and performance measurements using your smartphone's sensors. It offers unparalleled accuracy and a wide range of features for measuring acceleration, speed, power, and torque, all without external equipment.
- Measure engine power (DIN, CEE, SAE, JIS, ISO)
- Measure performance (accelerations, speed, braking)
- Simulate performance metrics
- Calculate gearbox ratios
- Measure lap times on track
- High accuracy sensor combination
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PerfectPower is, in the form of a revolutionary smartphone application, the automotive reference on-board system in power and performance measurements, the one with the best price / reliability of results / variety of features / operational independence ratio! Indeed: 1) Exceptional and unprecedented results reliability for a smartphone application, comparable to that of professional equipments, since it measures acceleration, speed, and distance with an accuracy of +- 0.5%, and power and torque with an accuracy of +- 1%! For information, a friendly challenge of 10,000 euros & dollars was launched on this subject on May 1, 2024, which is still waiting to be taken up… Note: Such accuracy is made possible by the accurate, permanent, and clever combination of the information of the accelerometer and the GPS of the phone, knowing how to take the best of both sensors while eliminating the specific disadvantages when used individually. 2) Unprecedented features variety not only for a smartphone application but also all equipments combined, since it allows to: - Measure the standardized engine power (DIN, CEE, SAE, JIS, ISO) - Measure the performance (accelerations, runs flying start, max speed, braking -soon available-) - Simulate the performance (accelerations, runs flying start, max speed, ideal max revs) - Calculate gearbox ratios by rev calibration (as on chassis dynamometer) (soon available) - Measure freewheeling losses (soon available) - Measure lap times on track Of course, as its name suggests, PerfectPower specialized in power measurements, which are the most interesting measurements of all in Automotive Physics! 3) Total operational independence, since it requires absolutely no connection to any external equipment (external GPS, car ECU, etc), which allows it to operate on 100% of the cars produced on the planet, and with only your smartphone as a measuring instrument! This does not prevent it from accepting communication via Bluetooth with certain high-performance external GPS in order to further optimize its results accuracy! 4) It only costs… 33 euros & dollars (27 currently), when: - a chassis dynamometer (professional power measurement tool) costs between 30,000 and 120,000 euros & dollars! - a simple pass on such equipment is charged 50 to 120 euros & dollars (without guarantee of maximum reliability!) - an optical reading system (professional performance measurement tool) costs around 15,000 euros & dollars! Of course, there are a certain number of rules to follow to achieve optimally accurate measurements (the most important being to perform measurements in both directions of the road -and on the same portion- and to ask PerfectPower to average them in order to eliminate the effects of road slope and wind), but when these rules are well followed, PerfectPower has proven that: - It was as accurate for power measurements as the best chassis dynamometers (Rotronics -France-, Maha -Germany-, DynoJet -USA-) - It was as accurate for acceleration measurements as the best external GPS, the RaceBox Mini - It was significantly more accurate than any other smartphone application in the field All information about this awesome application on its official website www.perfectpower.pro
Dyno Chart
This tool analyzes your vehicle's engine performance, displaying max power and torque against RPM. It connects via an OBD II adapter to gather sensor data and generate detailed charts. Ensure compatibility before unlocking full features.
- Max power and torque vs RPM charts
- OBD II sensor data collection
- Vehicle compatibility check
- ELM Wi-Fi/Bluetooth LE adapter support
- In-app chart function unlock
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Dyno Chart is vehicle engine performance evaluation tool, which provides you the information of max power and torque vs RPM. Dyno Chart app uses OBD II interface on your vehicle to collect sensor data and build the chart. Please follow the app instruction for compatibility check before you purchase and unlock the in-app chart function. The app needs an ELM compatible Wi-Fi or Bluetooth Low Energy (for iPhone4s and later) adapter to work. You can check Developer WebSite for Adapter Guide: http://www.outdoor-apps.com/enginelink.html Drop us an email for any suggestions/questions you may have at support@ksolution.org. We will answer.
Screenshots
Verdict
The clearest difference is review sentiment: PerfectPower at 95% against Dyno Chart's 20%. PerfectPower also leads on in-app purchases (none vs 1). Dyno Chart's advantage is price (Free vs $33.00) and iOS requirement (7.0 vs 12.0). On update cadence, ads and device support 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
Dyno Chart is free to download; PerfectPower costs $33.00 up front. Dyno Chart sells 1 one-off in-app purchase. PerfectPower asks for nothing beyond the download.
PerfectPower ships an update every 2 months, Dyno Chart every 3 months. The most recent releases landed on September 21, 2026 and August 25, 2026 respectively.
| Parameter | PerfectPower | Dyno Chart |
|---|---|---|
| Price | $33.00 | Free — better |
| Rating | — | 1.2 (6 ratings) — better |
| Positive reviews | 95.0% of reviews — better | 20.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 | 7.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | La maison de Spinoza | K SOLUTION LLC |
Customer experience
PerfectPower
Dyno Chart
In-app purchases
PerfectPower
No in-app purchases
Dyno Chart
- Dyno Chart Unlock$4.99









