Building X Access vs CH Digit Access
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Building X Access
Read full descriptionHide full description
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.
CH Digit Access
Read full descriptionHide full description
Use CH Digit Access to access Web sites and networks or to digitally sign transactions in a highly secure and user-friendly way. CH Digit provides a time based 2-factor authentication solution for any remote access, protecting from hacking and theft. The OTP is unique for each transaction and can’t be re-used. After downloading and installing BS Digit Access on your iPhone, you will need to register it in order to activate it and make it unique for you. Your service provider will provide you with appropriate registration instructions. FEATURES: Fast authentication using notifications Asymmetric key protection Secure authentication using device mechanism Secure registration and activation. TOTP support Protection against wide range of attacks including: Phishing Man in the middle Brute Force attack on PIN. PIN or secrets attack by application reverse engineering or memory analysis. PIN prediction by Differential Power Analysis. Memory cloning. One iPhone application for all authentication needs. Intuitive interface.
Screenshots
Verdict
The clearest difference is update cadence: Building X Access at every 4 weeks against CH Digit Access's every 19 months. CH Digit Access's advantage is iOS requirement (14.0 vs 16.0). 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.
Building X Access ships an update every 4 weeks, CH Digit Access every 19 months. The most recent releases landed on July 9, 2026 and September 9, 2026 respectively.
| Parameter | Building X Access | CH Digit Access |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks — better | Every 19 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 132 MB |
| Age rating | 4+ | 17+ |
| Developer | Siemens AG | AltiPeak SA |
In-app purchases
Building X Access
No in-app purchases
CH Digit Access
No in-app purchases





