j901 User Reviews

Is j901 Safe?

Not enough ratings yet to assess j901.

Is j901 Legit?

j901 is no longer available in the App Store. AppsHunter Legitimacy Score for j901 is 35/100.

Based on 35 of 100 points across 7 verification signals from App Store and developer data.

Score capped because this app is no longer listed.

Top reviews

Latest update made it stop opening on my iphone XR

Other than that it's fantastic

Excellent

Outstanding port of J to IOS. Very handy.

J Everywhere

To paraphrase a well known photographers’ saying, “the best computer language is the one you have with you”. Such a useful tool to have available whenever you need it. Two issues to feedback: 1. the plot package is reported as corrupted. 2. The controls at the top of the screen are partially obscured by the display island/notch on newer iPhones, so are hard to use.

As an update, deleting the previous version and then reinstalling from scratch fixed the plot package issue.
Show more

Phenomenal!

So thankful this was put together! Only programming language I use on my phone

Great upgrade

Been using your app 3 weeks, on iPhone, a way better version than J701. Wish there was an APL app too, for iOS, as I find the symbols easier for visualisation / recall, even if I then write it in J!

Excellent implementation of J.

Very handy companion to desktop/laptop implementation. Vastly superior to previous implementation. Enjoy J on your phone.