Building Start vs AeroBT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Building Start
This platform digitizes field testing for construction and engineering projects. It allows for centralized test plan creation and offline execution on field devices, synchronizing data back to the cloud upon completion.
- Centralized test plan authoring
- Push test plans to field devices
- Offline field testing capabilities
- Data synchronization to cloud
- Digital capture of construction projects
- Support for TAB, Building Startup, Commissioning, Energy Audits
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Building Start is a field services platform used in construction and engineering to perform centralized test plan authoring and management and push the test plan from the cloud to field devices to perform on-site field testing digitally. Once a field technician has been assigned a project, they can receive the project on their field device and perform the test plan and responses offline and synchronize them back into the cloud when they complete their work for the day. Building Start is widely used in the construction industry with over 30,000 construction projects digitally captured in such efforts as Test, Adjust & Balance (TAB), Building Startup, Building Commissioning (LEED, Green Building,etc) and Energy Audits.
AeroBT
This tool simplifies VAV balancing for various VAV controllers. It allows users to drive VAV boxes to maximum or minimum airflow, automatically calculate K-factors from hood measurements, and zero airflow sensors. The app also includes override functions for troubleshooting mechanical issues.
- VAV balancing for FBVi, CBV, CBV-N controllers
- Drive VAV boxes to max/min airflow
- Automatic K-factor calculation
- Automatic airflow sensor zeroing
- Damper override for troubleshooting
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AeroBT is an easy to use, intuitive tool for VAV balancing for FBVi, CBV and CBV-N VAV controllers. Drive VAV boxes to max or min air flow and calculate K-factor automatically when recording hood measurements. Also provides automatic zeroing of air flow sensors. With overrides, fully open and close dampers to troubleshooting mechanical issues.
Screenshots
Verdict
The clearest difference is rating: AeroBT at 5.0 against Building Start's 3.4. AeroBT also leads on iOS requirement (11.0 vs 15.0). Building Start's advantage is update cadence (monthly vs every 13 months). On price, ratings volume, ads and in-app purchases 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.
AeroBT holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 8 and 3 respectively.
Building Start ships an update monthly, AeroBT every 13 months. The most recent releases landed on August 16, 2026 and September 15, 2026 respectively.
| Parameter | Building Start | AeroBT |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (8 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 8 — better | 3 |
| Update frequency | Monthly — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Building Start | Cylon Controls Limited |
Customer experience
Building Start
AeroBT
In-app purchases
Building Start
No in-app purchases
AeroBT
No in-app purchases
