[Verizon Samsung Galaxy S III] JollyChollie:
RealCalc Pro

I bought and have RealCalc Pro. It's nice and does most all that I'd Expect... However, the History was not in Color like the Samsung Galaxy S III's History. I have found a Great Calculator that I think Motorola will want to consider for their next Stock Calculator. It is called "Calculator Mem Pro", (the Calculator Mem, {not the Pro Version}, with Ads may show Porno Ads).

Calculator Mem Pro Rivals the Samsung Galaxy S III Stock Calculator, and Beats it by a Mile~! Includes the Plus / Minus Change Button, a Percent Button, Parentheses, Plus a History, Memory Plus / Minus, the Colors can be Changed, and as a Super Added Bonus it can also be a Widget~! The History can Copy either the Formula or the Results or Import to the Display, or Copy or Send to Email. Calculator Mem Pro is by far the Best Normal Accounting Calculator that I've found, with RDev Calculator being my 2nd Choice.

I found several other Calculators that were more Specific like Scientific Calculators, (like RealCalc Scientific Calculator / RealCalc Plus) that also had Plus / Minus Change Button, a Percent Button, Parentheses, Plus a History, Memory Plus / Minus, and even had a History, but they are pretty Complex, or Intimidating looking.

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I went through about 25-35 Calculators, including...

CalcBuddy

calCOOLator

CalcRT, v.1.3

Calculations, (or Calculations 4.0 Pro)

Calculator 3, v.1.1

*Calculator Memory Pro, v.2.5.2

Calculator, (UtopicSoft)

*Calculator Calzo Free No Ads

*ClickCalc

Cool Calculator

Easy Calculator

handyCalc, v.0.53,

*MobiCalc, v.1.3.8, ~ Dark

My Basic Calculator,

My Calculator, (Stormin Dorman Productions)

Office Calculator Pro, v.3.1.0

*RDev Calculator

RealCalc Scientific Calculator

Seven+ WP7 Calculator,

ShakeCalc

Simple Calculator

StdCalc

*Total Calculator-Paid,

Twin Calculator

*RDev Calculator and Calculator Memory Pro are my Favorites so far, (they have Functionality and Color). RDev has a Built in FUNC Key, where the Default is x+15% , {This percentage can be changed}, Great for Tips, enter the amount and Press FUNC and it will Calculate how much to pay including the Original Cost).

Calculations, (or Calculations 4.0 Pro) has 5 Essential Functions: Advanced Calculator, Currency Converter, Measurement Converter, Mortgage Calculator, and Tip Calculator. Has a New way of selecting that resembles a Great Approach to a Smart Phone App, (rather than make a Calculator Clone App that resembles a Real Hand Held Calculator). However, it's method of Adding kept coming up with different answers than I expected, so it was unuseful to me.

CalcBuddy has the most Realistic Looking Graphic User Interface, (GUI), but it lacks the Plus/Minus Change Sign & the Percent Button, and a Separate Tape History would allow for bigger Text Size, and be more Readable.

My Calculator, (Stormin Dorman Productions) has no History Tape, no Parentheses, but has the Memory +/- Retention, {I sometimes can use the Memory to replace the Parentheses), but great Color GUI. Works Great also~! Nice Design.

Office Calculator Pro, v.3.1.0 really has potential. Very Reliable. Has a History Tape, no Parentheses, but has the Memory +/- Retention but just no Pizazz~!. The Colors are so Pastel, no 3-D Effects, like My Calculator, (Stormin Dorman Productions) or CalcBuddy has. If CalcBuddy & Office Calculator Pro could combine and add the Parentheses, and put some Color on the History Tape this would be a keeper, {or if My Calculator & Office Calculator Pro could combine and add the Parentheses, and put some Color on the History Tape, a great iPhone Clone Calculator would emerge}.

Total Calculator-Paid has the 2nd Best Color History, (Samsung Galaxy S's Stock Calculator is Number One in that Department); but I don't like the Color of the Skin of the Calculator, and you have to go to a 2nd Menu to Access it everytime. It should Combine with Calculator Mem Pro or RDEV Calculator to give us the best of all worlds.

Calculator Calzo Free No Ads is a real Competitor also, it's a new way of doing things, but you get several Screens that can Copy Back & Forth with One Another, (Eliminates the need for Parentheses, and there's no Equal Sign, See it for your self ~ Search for Google Play Store and find "Calculator Calzo Free No Ads").

ClickCalc works well, and has some Color, (looks like a Junior High School Calculator).

MobiCalc (Dark) could almost be my Favorite Calculator if it had some More Color in the Display, (the Expressions and Results and Operators). However, it works Great~!

I like the way RDev Calculator adds, 35 + 3.39 + .77 + 9.01% = 42.69., {Not 39.23}, and I like the Colors and the Haptic Feel, {but the History keeps Clearing when I Exit ~ I wrote them, they'll clear that up}. RDev Calculator could move up into my Number One Spot, bumping Calculator Memory Pro when they get the History Tape worked out, (it only Erases if you Exit, so, just never Exit between Stores. For Example, 48 AA Batteries are $18.48 at one store, but 16 AA's are on sale someplace else for $15.95. Which is a Better Deal, (with the History Tape, I can make that Determination Fast).

I also have to Press Equal after the Additional then Add in the Percent on Calculator Memory Pro to get the same Result, {such as

(35 + 3.39 + .77) = 39.16 + 9.01% = 42.69}. Although the Parentheses are not necessary, unless I was adding Two Different Expressions such as:

(14 x 4) + (14 x 4.5) = 119

Calculator Memory Pro is pretty Awesome, the Display could be Bigger, and sometimes typing aLeft Parentheses... "(" ... doesn't Clear the Previous Equation, {but I wrote them and I'll bet that they'll have that Corrected Soon also}. I just have to remember to press the Clear Button before I start. Typing anything other than the "(" clears the Previous Equation. Really this is my Favorite for right now.

If "My Basis Calculator" could just have a History and put the Percent and Plus/Minus Change Sign Button on the Portrait View this would be an Ideal Smart Phone Calc, as the Haptic Feel is just right; (and as a Bonus, I made my own Colors that I think that they're going to incorporate into their DownLoad).

I want the Key Pad of (Calculator Memory Pro / RDev Calculator) meets (CalcBuddy & My Calculator) and the Tape History of Total Calculator and the Accuracy of Office Calculator Pro. Is that too much to ask? Color My World. Build this Calculator~!