CPM vs Building X Access
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPM
Manage your rented vehicles on the go with this app. Access vehicle data, find service partners, and handle accident procedures. Submit documents, track activities, and report expenses and mileage easily.
- Vehicle data overview
- Service partner navigation
- Accident first aid information
- Document transmission
- Activity timeline
- Expense reimbursement
- Mileage reporting
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The Service App of Car Professional Management (CPM). With the CPM app, customers of Car Professional Management (CMP) also benefit from the extensive range of services offered by Germany's number 1 fleet manager while on the move. From an overview of all vehicle data to direct navigation to over 14,000 service partners: the CPM app has been consistently designed with the user in mind and offers many practical functions relating to the use and management of rented vehicles. Practical: The most important information is also available without an internet connection. First aid information What to do in case of an accident? Our checklists show you what to do and what else to look out for. Transmitting documents Quick and easy: transmit documents such as handover and return protocols or damage reports directly to CPM via the CPM app in just a few steps. Overview of activities (timeline) Has my order already been triggered? Is the cash deposit for payment shown? When do I have to return a vehicle? You will find all important information clearly arranged in your personal timeline. Reimbursement of expenses Simply submit receipts and vouchers directly via the CPM app. Simply photograph them or attach them as a PDF, send them off and you're done. Mileage Tell us the mileage of a vehicle easily and conveniently via the CPM app. You can find the settings for this in the "My vehicle" overview.
Building X Access
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With Building X Access you will use your smart phone to open doors. With this app you will receive digital keys for doors that you are allowed to open.
Screenshots
Verdict
The clearest difference is update cadence: CPM at every 4 days against Building X Access's every 4 weeks. CPM also leads on device support (3 vs 1). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CPM ships an update every 4 days, Building X Access every 4 weeks. The most recent releases landed on September 7, 2026 and July 9, 2026 respectively.
| Parameter | CPM | Building X Access |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 64.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 108 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Car Professional Fuhrparkmanagement und | Siemens AG |
In-app purchases
CPM
No in-app purchases
Building X Access
No in-app purchases





