User Friendliness - 9/10 Commands entered, even when installed, use real(##,[functions]) . Although this makes the program able to be transferred, it also makes it hard to read. Other than that, due to online help, it is very easy to use.

Usefulness - 10/10 If there's something this program can't do, it will probably be able to in the next release. The fact that it's (as of today) still a live project really helps.

“Omnicalc” has seen many updates to its name lately with v1.23 being by far its best update. Now with the added support of “Symbolic” and “MirageOS,” it is necessity for your 83+.

“Omnicalc” has many useful features. Some features that stand out from the rest for me are: the “Entries” menu, which allows you to paste past entries via a menu, as well as the “Custom” menu, which allows you to paste tokens stored from the catalog. The altered log(), log(number,base), has been very useful during math. So too have simp(square root)and const(). The parenthesis bug fix now allows you to close a parenthesis around certain tokens such as: (5nCr4). In previous versions you could only use these functions in the home screen, but with v1.23 you can now use them in BASIC programs. I hope to see a “Curly&Square” bracket assistants in a future releases and for the current functions be able to parse in areas other than the home screen.

“Omnicalc” is the best Application by far that I have ever seen. It offers you so many features, I couldn't name them all here without taking up the whole page. I'll try to name as many as I can, though. “Omnicalc v1.21” offers you even more features than before, and that would seem impossible! Now, it offers sound in BASIC programs! Oh, how long I have waited for that! It also allows you to execute ASM commands like b_call(_ClrLCDFull) from BASIC programs(if you know the opcodes, that is). It lets you convert from any base 2-32 in a snap, so no more thinking for you! It can also factor any positive integer, simplify radicals, restore your memory, and lets you have a virtual calculator inside your usual one! Even more features include converting Roman Numerals to decimal numbers, subfactorials, returning numeric values of constants, returning the gamma of a number, sending and recieving bytes over the link port, remainders of division, sprites, [On]+[Alpha] to run MirageOS, symbolic functions, thousand seperators, an entry menu, hiding the Finance APP, a quick APPS menu, memory protection, a parentheses assistant, a custom menu, custom font sets, and compressing basic and ASM programs!

If you can't see from this that you should download this Application, you are not as smart as you think you are.

An awesome program for the TI-83+/SE! With all its extra functions for the calculator, this is a must download. All but one or two of the functions have practical applications for everyday use, and some can be used for more things than one - i.e. the "factor(" may be used also as a prime number checker. Also amazing is the small file size - only one App space, and it crams in and “Entries” menu, RAM recovery, base conversion, and much, much more. In short, it is extremely efficient, especially for TI-83+ users who only have about 150k or so of archive memory on their calculators. This program would be great for almost anyone in any math class from Geometry and up - some things you are too lazy to do, such as simplifying radicals, are done (almost) instantly with Omnicalc.

The only drawback that I have found with this program is that some commands, such as base conversion through the use of "baseInput(", are difficult to understand - at first, (like me :P) you don't really know what syntax to put in the brackets, and it wasn't until later that I found out about the help.

This is an awesome APP for the 83+. If you haven't tried it out, download it!

One of the most useful features is RestoreMem( because you can back up your RAM incase that game of yours crashed :) Once set, it will automatically backup when you press [2nd] [Off]. So if a stupid friend popped a battery, you can use this!

Another feature which is quite handy is Entries Menu. This allows a full scrolling menu of all the past entries. If you do repeated calculations and don't like to [2nd] [Enter] a lot to do it (Physics formulas, Calculus problems, etc.), this function is a must use!

Although I don't use it, Virtual Calculator will allow simultaneous calculations in two different calculators in only one! The only thing bad about it is if you do Archiving while this is activated, it may cause a crash like in MirageOS games or something.

Base Conversion is really nifty! When I need to convert hex to binary in a flash, or vice versa, I use this! Supports bases 2-32, so convert at your own leisure!

I have not touched on the extra functions yet. Pressing [Prgm] twice will give a whole bunch of extra functions to use. I won't even cover them here. If you have Symbolic APP installed, you can use them also! The most used function that I use the most is the custom menu. You can store your most used functions in here. I store all my programming and string related functions here (because it takes a while to find them in the Catalog, knowing you can't use hotkeys like in other menus).

This APP is wonderful, albeit a single problem, it is extremely useful and should be used on ALL calculators that have room. The TI-83 SE (Silver Edition) calculators will benefit the most from this APP. The Virtual Calc feature is helpful, but I don't use it much.

RAM recovery, on the other hand, is very helpful, but don't depend on it. The area where the backup is stored can still get corrupted, and it only works with the Silver Edition (because of extra RAM that's added). Keeping backups of you RAM in a group is still a good idea. It has base conversion features, which in my opinion function well. And as an added bonus, you can choose an option from Omnicalc's extended menu (hit Program key twice)and press the plus key (like in the Catalog help APP from TI) and get instant help for any of the functions.

Other features like Entries menu can be annoying, but you can disable it. The Parentheses Assistant is nice if you find yourself adding too many parentheses in an equation and then you always wonder why you get a Syntax error.

Also if you have the Symbolic APP on the calculator, when installing Omnicalc, Symbolic will also install (very cool).

Good News: TONS of features in such a small package. Compatible with Symbolic. RAM recovery can get you out of a jam.

Bad News: Incompatible with anything other than Symbolic that adds a menu. Tokens (the displacement of additional functions) are screwy in OS 1.15 or later (1.14 highly recommended). Factoring feature could support larger numbers.