Comparison

simos.app vs 85Blends

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

85Blends

Features
Read full description

85Blends — Your E85 & Flex-Fuel Companion Whether you’re running a flex-fuel setup, mixing ethanol blends yourself, or just looking for your next E85 fill-up, 85Blends gives you the tools you need in one place. CALCULATE YOUR BLEND Quickly calculate how much E85 and gasoline to add to reach your target ethanol content. Enter your current fuel level, current ethanol percentage, target blend, and tank size — 85Blends handles the math. Use At The Pump for quick calculations while filling up, including partial fills and gas-only adjustments. FIND E85 NEARBY Discover nearby E85 stations using your location, browse station details, save favorites, get directions, and share stations with other drivers. Recent nearby stations can appear immediately when you reopen the app while fresh station data updates in the background. Community Pricing lets drivers submit and share current E85 prices to help keep station information useful for everyone. KEEP TRACK OF YOUR CAR Add your vehicle to Garage and keep important fuel and maintenance information organized. Track: • Fuel fill-ups and ethanol blends • Mileage and fuel history • Maintenance reminders • Vehicle fuel and tank information Cloud Sync helps keep supported app data available across your Apple devices and is included for both Free and Pro users. 85BLENDS PRO Upgrade to Pro for additional tools built for drivers who use E85 regularly: • Intelligent E85 Trip Planner • Interactive Stations map • Map or Classic Stations layouts • Unlimited Garage vehicles • Ad-free experience Trip Planner helps you plan longer drives around available E85 stations, estimate fuel stops, and open your preferred navigation app when you’re ready to drive. BUILT FOR E85 DRIVERS 85Blends is designed to make ethanol blending and E85 station discovery simpler without requiring an account. Whether you’re filling with straight E85, mixing an E30/E50/E70 blend, or keeping track of a flex-fuel vehicle, the tools you need are always close by. Location access is optional and used for nearby station features. Automatic Pump Detection is also optional and can be enabled separately. Support: support@85blends.app Privacy Policy: https://85blends.app/privacy.html 85Blends Pro is an optional auto-renewable subscription. Subscription features and availability may change as the app continues to improve.

Screenshots

simos.app4 screens
85Blends4 screens

Verdict

The call

The clearest difference is ads: simos.app at none against 85Blends's shown. simos.app also leads on update cadence (weekly vs fortnightly). On price, in-app purchases, 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 and 85Blends sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

simos.app ships an update weekly, 85Blends fortnightly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
simos.app versus 85Blends: the parameters behind the verdict, then further details
Parametersimos.app85Blends
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyWeekly — betterFortnightly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS17.617.6
Further details — not scored
Size7 MB24 MB
Age rating4+4+
DeveloperTycho Sebastian HolzerJulian Figueroa

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
1 purchases

85Blends

Subscriptions1
  • 85Blends Pro$3.991 Month

Questions

Is simos.app free?
simos.app is free to download, with in-app purchases available.
Is 85Blends free?
85Blends is free to download, with in-app purchases available.
Do simos.app or 85Blends have ads?
85Blends shows ads; simos.app does not.
Which is updated more often, simos.app or 85Blends?
simos.app ships an update weekly, and 85Blends fortnightly. Most recently, simos.app was updated on November 6, 2026 and 85Blends on October 31, 2026.

Other comparisons