According to the figures of third-party dual-opening app Parallel Space in 2023, gbwhatsapp and official WhatsApp coexistence installation success rate on the same phone is 78% (Android 10 or higher). APK package name has to be changed (e.g., from com.gbwhatsapp to com.gbwhatsapp clone), and storage space should be ≥2GB (installation package sizes are 82MB and 45MB respectively). For instance, when Indian online retailers run on the Samsung Galaxy S23 Ultra at the same time, the daily order processing capacity increases from 200 to 450 (125% growth rate), but maximum memory usage increases to 1.1GB (580MB for a single application), and the chances of system crash by invoking it increase to 21% (7% for a single application).
Technically, dual-opening has to overcome the SELinux policy of Android (by altering the sepolicy rule). And isolate data storage paths (such as gbwhatsapp/data/data/com gbwhatsapp from the official version/data/data/com. Whatsapp). Tests by testing firm Omdia show that on Mediatek Dimensity 9200 hardware, CPU usage in dual-booting rose from 28% for an individual app to 52%, the peak body temperature was 47℃ (ambient temperature 25℃), and the rate of synchronization error in messages rose from 3% to 14%. On the legal side, in the 2023 Brazilian police-busted fraud case, the scammers had two accounts with the dual-opening feature to transfer funds, but were apprehended due to the connection between IP addresses. The amount involved was 280,000 US dollars.
On the legal side, the EU General Data Protection Regulation (GDPR) requires applications to quietly isolate user data. The probability of gbwhatsapp passing metadata (i.e., device ID and IMEI) to the official version is 64% (isolation rate of third-party tools is 32%). This led the Hamburg Data Protection Authority in Germany to fine a specific logistics company 100,000 euros in 2024 (with regard to 12,000 pieces of non-conformist data). Section 43A of India’s IT Act requires companies that utilize the dual-on function but do not report for it with a penalty of up to 5 million rupees (approximately 60,000 US dollars). For instance, in March 2024, Flipkart was fined 780,000 rupees for the non-reporting by its employees of dual-on activities.
User 
behavior data shows that about 29% of gbwhatsapp users worldwide have tried dual-opening (68% in developing markets), among whom the 18-35-year-old age group switches apps an average of 9 times per day (2 times for users over 45). For instance, Pakistani cross-border traders have enhanced efficiency in handling orders by 160% through dual-opening classification management of suppliers and customers. But due to the dual-opening equipment such as Shelter’s storage isolation delay (0.8 seconds per instance), the touch response deviation rate rose from 120ms to 210ms (a deviation rate of 75%).
From an optimization-of-performance perspective, enabling “independent sandboxes” (such as Samsung Knox or Huawei TEE) can reduce the threat of data leakage in dual-opening from 21% to 4%, but additional hardware costs (such as a Knox license fee of $1.2 per device per month) will be required. If the device is equipped with UFS 3.1 flash memory, the cold startup time in dual-boot can be lowered to 3.8 seconds (7.2 seconds for eMMC 5.1 devices), but battery life is reduced by 1.5 hours (according to the 5000mAh test). Counterpoint research firm suggests that enterprise customers adopt dual-on through MDM platforms (such as VMware Workspace ONE), and the level of completeness in compliance audit fields increases to 98%, but the average monthly cost is $7.5 per device (the personal plan is free but the isolation level is only 35%).
Customer feedback indicates that with two-opening situations, the rate of failed cloud backup for gbwhatsapp rose to 18% (7% for official), and restore time for media files rose to 3.5 minutes/GB (1.8 minutes for a single application). For example, one Indonesian user lost 13,000 chat histories due to a double-start sync issue. Eventually, 89% of them were recovered by local backup (42 minutes). In general evaluation, it can be seen that though dual-opening enhances efficiency, one needs to compromise on performance loss, compliance with the law and operation and maintenance expenses.