Is a Periodic Table App Subscription Worth It?

Multiple users cite $9-14 pricing as excessive for content available free elsewhere (Wikipedia, WolframAlpha). The high price creates expectations for polish and functionality that aren't met, especially given stability issues and bloated file sizes.

Users willing to pay premium prices for quality educational tools, but expect professional content, stability, and ongoing updates. The fact that users paid $9-14 despite free alternatives shows demand exists for premium experiences when executed well.

One user complained about having to repurchase across devices ('If I buy an book for iBooks on the iPad, I don't have to pay again to read it on my iPhone'), suggesting preference for universal one-time purchases over device-specific payments. No subscription model complaints observed.