The best alternatives to Chartcube for Web and iPhone are Ludus, Observable, and Juice Analytics. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Developers choose Observable as an all-in-one solution to help them create and deploy expressive, performant data apps, dashboards, and reports.
Builders can iterate and explore data in live, collaborative notebooks. Then, using the open-source Observable Framework, they can create instantly loading data apps locally, using any language or library. It’s easy to securely deploy and host data apps on Observable. We take care of SSO, workspace management, audit logs, and more.