Comparison

simos.app vs DSFlex ECA

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

simos.app

This tool provides diagnostic, data logging, and flashing capabilities for VAG petrol engines with specific Simos ECUs. It allows real-time monitoring of engine parameters, ECU identification, and analysis of recorded data through multi-channel graphs. Users can also update their ECU with stock or custom tunes.

Highlights
  • Real-time ECU parameter logging
  • ECU identification and info
  • Multi-channel log analysis graphs
  • ECU and TCU flashing
  • Support for Simos 18.x and 12.1 ECUs
Read full description

simos.app is a diagnostic, data logging and flashing tool built specifically for VAG petrol engines running Simos 18.1, 18.2, 18.6, 18.10 and Simos 12.1 ECUs. The platforms found in most modern TSI and TFSI engines across Audi, VW, Škoda, SEAT, Cupra and Porsche. LIVE DATA LOGGING Read ECU parameters directly in real time. Monitor boost pressure, injection timing, lambda, temperatures, torque and more at high sample rates over a Bluetooth LE connection. ECU IDENTIFICATION Read software versions, calibration IDs and hardware info straight from the control unit. LOG ANALYSIS Visualize recorded sessions with multi-channel graphs. Spot correlations between parameters without leaving the app. FLASHING Update your ECU and TCU to the latest version for your vehicle or flash a custom tune. Full features available for Simos 18.1/18.10 and 18.6. Flashing stock files or pre-unlocked ecus for Simos 18.2, 18.4, 18.41 and Simos 12.1. –– Built for enthusiasts, tuners and workshops who need more than a generic scan tool. Basic knowledge of ECU diagnostics is recommended. This app is for informational and diagnostic purposes only. Any modifications to vehicle systems are the sole responsibility of the user and must comply with local laws and regulations. –– Bluetooth LE OBD adapter required. Get yours here: https://simos.app/dongle Other compatible adapters: Macchina A0, DIY A0 clone https://github.com/Switchleg1/AMAleg require custom firmware: https://simos.app/dongle/firmware

About

DSFlex ECA

Read full description

DSFlex ECA is the official companion app for the DSFlex Ethanol Content Analyzer — a precision Bluetooth sensor that measures the real ethanol content and temperature of the fuel in your tank. Built for flex fuel tunes, E85 conversions, and anyone running a blend of gasoline and ethanol, DSFlex ECA gives you accurate, real-time readings so you can tune with confidence. FEATURES - Live ethanol content (%) and fuel temperature, streamed over Bluetooth from your DSFlex sensor. - Blend Calculator with two modes — Target Mix (hit a specific ethanol blend without topping off) and Fill Tank (top off completely using two fuels). - Customizable units — Fahrenheit or Celsius, liters or gallons. - Set your local pump gas ethanol percentage and default tank size for accurate calculations. - Clean, simple interface built for quick glances while working on your vehicle. DSFlex ECA is a measurement and information tool. It does not tune your engine or control any vehicle system — it gives you the accurate data you need to make your own tuning decisions. Requires a DSFlex Ethanol Content Analyzer sensor (sold separately).

Screenshots

simos.app4 screens
DSFlex ECA4 screens

Verdict

The call

The clearest difference is in-app purchases: DSFlex ECA at none against simos.app's 3. simos.app's advantage is update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. simos.app sells 3 one-off in-app purchases. DSFlex ECA asks for nothing beyond the download.

UpkeepUpdate frequency

simos.app ships an update weekly, DSFlex ECA every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
simos.app versus DSFlex ECA: the parameters behind the verdict, then further details
Parametersimos.appDSFlex ECA
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.617.6
Further details — not scored
Size7 MB1 MB
Age rating4+4+
DeveloperTycho Sebastian HolzerDaviti Samakashvili

In-app purchases

3 purchases

simos.app

One-time3
  • App VIN Unlock$17.99
  • Wizard: Pops & Bangs - Single Bin$17.99
  • Stage 1 Bin$179.99
None

DSFlex ECA

No in-app purchases

Questions

Is simos.app free?
simos.app is free to download, with in-app purchases available.
Is DSFlex ECA free?
DSFlex ECA is free to download, with no in-app purchases.
Do simos.app or DSFlex ECA have ads?
Neither simos.app nor DSFlex ECA shows ads.
Which is updated more often, simos.app or DSFlex ECA?
simos.app ships an update weekly, and DSFlex ECA every 3 weeks. Most recently, simos.app was updated on November 6, 2026 and DSFlex ECA on October 31, 2026.

Other comparisons