Ventappen vs VentLogIQ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ventappen
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Ventappen hjälper dig med de vanligast förekommande ventilationsberäkningarna! VoltAir System AB, som producerar marknadens mest energieffektiva luftbehandlingssystem, erbjuder ett beräkningshjälpmedel för ventilationstekniska beräkningar – Ventappen. Ventappen hjälper dig med de vanligast förekommande formlerna för beräkning av ventilationssystem: Temperaturverkningsgrad, värme- och kyleffekt, beräkning av flöde och hastighet, fläktlagarna samt k-faktor beräkning. Nu kan du spara mycket tid genom att göra dessa beräkningar direkt i din mobil. För mer information om VoltAir System AB och våra energieffektiva produkter se vår hemsida http://www.voltairsystem.com
VentLogIQ
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VentLogIQ is a practical technical toolbox for ventilation and HVAC professionals. Designed for service technicians, air balancing technicians, installers and controls engineers, VentLogIQ brings useful calculations, diagnostics and field workflows together in one app. Use VentLogIQ for everyday troubleshooting, commissioning, service and air balancing work. Tools and features include: • Air balancing projects with systems, zones and terminals • Fast measurement entry and airflow comparison • Airflow Reports in PDF • CSV export of measurement data • Signal conversion • Sensor calculations • Modbus TCP monitoring • K-factor and airflow calculations • Air velocity to airflow calculations for circular and rectangular ducts • Fan laws • SFP calculations • Duct sizing • Duct pressure loss • Air change calculations • Heat recovery efficiency • Air heating and cooling calculations • Water heating and cooling calculations • Psychrometrics and dew point • Three-phase diagnostics • Filter diagnostics • Belt drive and pulley calculations • Pressure unit conversion • Pump rotation detection • Coil testing VentLogIQ Pro provides access to advanced workflows and tools, including the air balancing module. Pro features are currently available during the launch period. VentLogIQ is designed for quick use in the field, with support for multiple units, light and dark appearance, and both Swedish and English. Project and measurement data is stored locally on your device. The app works primarily offline, while Modbus TCP communication takes place directly on the local network. Measure. Calculate. Troubleshoot.
Screenshots
Verdict
The clearest difference is update cadence: VentLogIQ at every 2 days against Ventappen's every 65 months. Ventappen's advantage is iOS requirement (8.0 vs 16.4). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Ventappen ships an update every 65 months, VentLogIQ every 2 days. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.
| Parameter | Ventappen | VentLogIQ |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 65 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 3 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | VoltAir System AB | KARL DANIEL MIKAEL ERIKSSON |
In-app purchases
Ventappen
No in-app purchases
VentLogIQ
No in-app purchases





