With CALC 1 you can use the classic 10bii or 12 that you are familiar with, then when you need more, just navigate to any of the over 100 CALC 1 calculators! Switching between the calculators is easy since the stack, TVM and storage registers values are shared. For example, use either of the classic calculators to calculate a payment, then use the CALC 1 amortization calculator for a table or graph without have to re-enter the data. CALC 1 has currency conversion, UOM conversions, easy to use Forms for TVM, Depreciation and Bond calculation and so much more! The CALC 1 Calculators are: POWERFUL * Over 100 calculators instead of just 1 found on copies of hardware calculators. * Hundreds of solutions instead of a few dozen. * More solutions provided by your calculator = fewer mistakes from entering formulas. EASY * CALC 1's calculators have fewer, larger keys and the keys you need are on the top row. * Press and hold any key to display a hint for that key. * Undo to recover from mistakes. * Key Preview displays the value right on the key. Great for TVM calculations! * Tap the “?” on any calculator or screen for documentation and examples. COMPLETE * Chain, algebraic and RPN calculation modes. * Currency and UOM conversions from any calculator. * Recall recent results and inputs from the history list. * Graph any of the over 60 Formula Calculators. * List manager to view, edit, copy and paste statistical and cash flow data. * Layouts that make the most of you iPhone or iPad, portrait, landscape, slide over and split view. * Choose your own screen and key styles. CUSTOMIZABLE * Copy and paste keys to build calculators that work for YOU. * CALC 1 uses spreadsheet compatible formulas to customize. NO programming! * Customization saves time and reduces mistakes from entering formulas. CALC 1 is best used for: Finance; Real Estate; Banking; Business Studies; Accounting; Statistics; General Math; Science; Pre-Algebra/Algebra See the "Financial Calculator Comparison Chart" (link on the CALC 1 website) for a detailed comparison of features. Partial List of Focused Calculators (in addition to the 12CP) * TVM with annual interest rate and payments and compounding periods per year. * TVM with odd periods and periodic rates, simple and compound. * Math: Chain (K Key) * Math: General (M+, %) * Common Conversions (1 tap conversions in addition to conversion form calculator available from any calculator) * Statistics: 1 List (Central tendency and spread) * Statistics: 2 Lists (Correlation and line fitting) * Financial: Bonds (Price and Yield) A/A, 30/360, A/360, A/365, e30/360, annual, semi, quarterly and call. * Financial: Cash Flows (Cash Flow Analysis: NPV, NFV, IRR, MIRR) * Statistics: Probabilities (Probability and statistics functions) * Math: Trigonometry (General math and trig) * Curve Fitting: LIN, Ln, EXP, PWR, Expnt, INV Partial List of Formula Calculators (See support URL for complete list) You can create a graph as a function of any independent variable. You can create your own custom Formula Calculator. * Percent Change * Percent of Total * Markup as Percent of Cost and Price * Profit Margin * Breakeven * Economic Order Quantity * Newsvendor Model * Simple Interest Loan * Graduated Annuities * Normal Distribution PDF, CDF (with upper tail, 2 tails, 2 values) * Binomial Distribution PMF, CDF * Student T Distribution 1 and 2 tails Form Calculators let you view all inputs and results on one form. Some calculators apps call theirs "easy mode" * Loan * Time Value of Money * Amortization * Bonds * Depreciation * Currency Conversions * UOM Conversions * Dates CALC 1 has more calculators and features than can be listed here. See the Support URL for more information.