In Pictures: 20 essential business apps for iPhone and iPad

It's time to look at apps that make these mobile devices even more powerful for business users.

PRIVATE WiFi Developer: Private Communications

Cost: Pricing starts at $9.95/month for individual users. Family and corporate discounts are available.

Available on Android too? Not yet, but soon.

Most business travelers know that public Wi-Fi networks aren't safe, since most Wi-Fi signals are unencrypted, but many people still ignore that fact and use unencrypted Wi-Fi for important business, especially when a deadline is looming. With Private Wi-Fi, you essentially become invisible to would-be hackers. Private Wi-Fi encrypts all data going into and out of your device, acting like a personal VPN. Traffic is routed through Private Wi-Fi's secure servers. Private Wi-Fi also assigns you a temporary and random private IP address that cannot be traced through Private WiFi's servers, nor can anyone find your real IP address or location.

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