034SPI vs Calendus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
034SPI
This app allows users to flash their car's ECU/TCU, change fuel maps, and configure live data displays. It also provides diagnostic tools like reading and clearing DTC codes. Compatible with Dynamic+ ECU/TCU tunes and the Dynamic+ End User Flashing Dongle.
- Flash ECU/TCU tunes
- Change fuel octane/transmission files
- Configure live data displays
- High-speed data logging
- Read & clear DTC codes
- Perform adaptations/recalibrations
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Designed for use on iPhone/iOS as well as Apple Silicon-equipped laptops (M1, M2, M3), 034SPI allows you to easily flash your car, change fuel maps, configure live data displays, record and submit data logs to 034Motorsport's Tuning Support team, and utilize diagnostic support tools such as DTC/CEL code read/clear and more! Available now for use with any Dynamic+ ECU or TCU tune and the latest Dynamic+ End User Flashing Dongle (May 2023 & Newer)! Full App Features: Complete Any ECU Or TCU Tune flash Quickly Flash Different Fuel Octane Or Transmission Files Flash ECU/TCU Using Mobile Device's Internet Connection Enhanced Flashing Protocol Protections For Increased Flashing Stability User-Configurable Live Data Displays Dozens Of Defined Variables Available Multiple Display Types Available for Live Dt High-Speed Data Logging Of Pre-Defined Variables Easy Upload Of Logs To 034Motorsport Server Data Log Analysis Services Available Free Of Charge Read & Clear DTCs On ECU & TCU View Emissions Monitor Statuses Perform Adaptations/Recalibrations* Throttle Body Adaptation Fuel Tank Drain *Available for limited platforms, coverage expanding regularly
Calendus
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Calendus is the easiest way to manage and book appointments. Whether you're a business owner looking to streamline your schedule or a customer searching for local services, Calendus brings everything together in one simple, beautiful app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: 034SPI at none against Calendus's 4. 034SPI also leads on iOS requirement (12.2 vs 15.1). Calendus's advantage is update cadence (every 5 days vs every 2 weeks). On price, 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
Both are free to download. Calendus sells 4 in-app purchases, starting at $12.00 per month. 034SPI asks for nothing beyond the download.
034SPI ships an update every 2 weeks, Calendus every 5 days. The most recent releases landed on October 7, 2026 and September 20, 2026 respectively.
| Parameter | 034SPI | Calendus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (42 ratings) — better | — |
| Positive reviews | 55.0% of reviews | — |
| Number of ratings | 42 — better | — |
| Update frequency | Every 2 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 — better | 15.1 |
| Further details — not scored | ||
| Size | 124 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | 034motorsport Industries, LLC | Carlos Gasperi Ramirez |
In-app purchases
034SPI
No in-app purchases
Calendus
- Calendus Monthly7 Days trial$12.001 Month
- Calendus Pro Monthly7 Days trial$25.001 Month
- Calendus Yearly7 Days trial$119.991 Year
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- Calendus Pro Yearly7 Days trial$250.001 Year
