Calculator with History Tape 4+

Best calculator

I've used this calculator app for several months, really love it. It has a back delete button to erase just one number and not the whole thing. No ads, comfortable and easy to use, has a history, many options available, very intuitive. Congratulations to the developers. Update: Has been my favorite calculator. Exactly what I needed. I’ve used many different calculator apps and this one is absolutely the best. I can change the button size and the font size, love the customizable options, beautiful interface, I love the way it has a history, allowing me to see any possible errors, I can see everything I calculate. I use this calculator almost every day, it has everything I need! Update: Have used the app for 3 years, on my iPhone and my iPad, works great, practical and easy to use and no advertisements popping up. This app helps me a lot, it’s like the best thing ever.
Again just the best calculator. Thanks for making the app.

Great Calculator!!!

I recently purchased this and have been very pleased, especially since I have been through many, many other calculators and always deleted them when they said they were free, but when opened there was always a surprise significant charge after a few days or weeks. I really needed the history, but not all of the frilly bells and whistles. I was surprised to find that now I can even save histories (and delete them) under specific projects or dates and it even has single space backup/delete. Then, I was blown away to find a lifetime license that was very affordable that adds even more features!

Pretty useful calculator... with a few quirks

With no documentation and no other means of contacting the developer for guidance, I was forced to initially post a negative review in the hopes of getting some feedback as to how some of the features were supposed to work. After reading the developer’s subsequent feedback, I at least now know what the “diskette” and “folder” icons are supposed to do (see developer’s response — spoiler alert: tapping the “folder” icon will create an archive of all of the calculations that were on the screen, and the blank input screen you see is simply for entering the title you want to give that archive.) So, all in all, except for a few quirks (eg. adding a title to an individual calculation inserts it below the calculation instead of above?), it really is a pretty useful calculator. Now, if only there was a way to paste in values or expressions, or go back and edit a calculation you previously entered, that would be really helpful.

개발자 답변 ,

The instructions and examples:
Save: Tap on the “diskette” icon to save current history data which is displayed on the screen, type a title in the title box for the data. 
Load: You can tap on the “folder” icon and then choose a line with its title(The format: Your title + [rows of the data]) which you saved to bring the history data back to your screen. If you have further questions about this, you can also send an email to contact us (yytechplayer@qq.com).
--For example,
A.Enter:
1+2+3=6,
1+100=101,
1+1+1+1=4.
B.Tap on the “diskette” icon to save the three rows of data on the screen, give it a title "my test data A".
C.Clear the screen.
D.Enter:
2+1=3,
2+22=24.
E.Tap on the “diskette” icon to save the two rows of data on the screen, give it a title "my test data B".
F.Tap on the “folder” icon and then choose a line with title "my test data A" and you can see the three rows of history data displayed on the screen instead of that two rows of data.
G.Tap on the “folder” icon and then choose a line with title "my test data B" and you can see the two rows of history data displayed on the screen instead of that three rows of data.