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Zoho Invoice
Zoho Invoice is an easy to use and highly customizable invoice software for small businesses. It's mobile friendly, has payment reminders and recurring billing features.
sendSMS is one of the most reliable Communications Platform as a Service (CPaaS) that includes SMS & Chat Marketing (Bulk SMS, RCS Notifications, Viber Notifications, 2-way SMS, Mail2SMS, etc), Mobile Advertising on telecom networks customer database.