Statistics Calculator vs CEI Reader

Statistics Calculator-- is an introductory app for our flagship Statistics Calculator++, a calculator with great advanced scientific features as well as statistical, regression analysis, probability distributions, confidence intervals, and hypothesis tests capabilities.  Statistics Calculator-- will have all the functionality of Statistics Calculator++ by purchasing a single In-App Purchase. The purchase will remove the limit on the size of the lists, unlocks the advanced scientific features, graphs the regression models, and unlocks probability distributions, confidence intervals, and hypothesis tests capabilities. In designing the statistics functions of this app we had one thing in mind: The user should not need to read a single line of manual to perform the statistical analysis. Simply use Add X, Add Y, and Add f buttons to enter the elements of the lists and frequencies, if any. And you are done. All the statistics and regression models are only a few taps and swipes away. Tap the List button to see the lists entered. The elements of the lists are interpreted independently (as two separate lists) and jointly for regression analysis (if the size of the lists are equal). The sum, mean, population standard deviation, sample standard deviation, sample variance, sum of squares, min, max, quartiles, and sum of multiplications of two lists are presented in a table. Each statistics measure can be chosen from the table and used for further calculations. For regression analysis linear regression, logarithmic regression, exponential regression, power regression, and quadratic regression (through an additional In-App Purchase) are calculated. Statistics Calculator-- has an extremely simple and intuitive user interface to choose the regression model and calculate predictions for x and y values and view residuals and residual sum of squares. Other major features of Statistics Calculator-- are: - The left pane scrolls to reveal more functionality without a need to switch modes. The digits and most common operations are always visible and the less common operations can be revealed by scrolling the left half of the screen. - Shows the expression as you enter and keeps a history of your calculations (Swipe up on the screen to reveal the history) - Backspace to delete last digit entered. - Sinusoidal functions can be calculated for angles in units of degrees, radians, or gradians. The following features are available through Advanced Scientific In-App Purchase. - Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations. - Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format. - Capability of calculating permutation, combination, Least Common Multiple (LCM), Greatest Common Divisor (GCD), and prime factorization. - Quadratic and system of two linear equations solver - Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers) - Throws a set of dice (choice of 1 die to 4 dice) You are going to love the simplicity of the user interface and yet have the powerful functionality with which Statistics Calculator-- is loaded. Please do not hesitate to contact us for any questions, comments, to report any bugs, or to suggest additional functions you would like to see in the upcoming updates.

Hold your Romanian electronic identity card (CEI) against your phone and, within seconds, see everything stored in its chip: names, personal numeric code (CNP), date of birth, photo, signature, validity and, with the card PIN, your home address. Then do what you need with it: export a PDF that institutions can verify, sign documents electronically with the card, or keep it in a history protected by Face ID. WHAT YOU CAN DO • Read the CEI chip: surname, given names, CNP, sex, nationality, date of birth, document number, validity, issuing authority. • See the photo and signature stored in the chip, sharper than the printed ones. • Read the home address, protected by the card's 4-digit PIN. The address is no longer printed on the new card. • Export a PDF for a bank, school, notary or employer: the data, photo and address, plus a verification section (state signature, certificate chain, chip fingerprint, QR code) and a page with the holder's declaration and space for a signature and stamp. • Sign documents electronically with your ID card: pick a PDF from the phone, enter the CAN and the 4-digit PIN, hold the card. The electronic signature is created on the phone with the certificate in the chip, in PAdES format. Any other file gets a detached signature (.p7s). • Keep your read history and signed documents encrypted on the phone, opened only with Face ID, Touch ID or the phone passcode. History is optional and can be deleted at any time. "AUTHENTIC CEI" CHECK The chip data is digitally signed by the Romanian state at issuance. The app verifies the signature and the certificate chain up to the national authority (CSCA Romania) on the phone, so you know the data shown is exactly what is written in the chip. PRIVACY • No account, no server, no ads, no analytics. The app works without internet. • Data never leaves the phone. What you save to history is encrypted with a key kept in the phone's secure chip. • The PIN is never stored and is sent to the card once. The app never retries on its own and shows you how many attempts remain. • PDFs and signed documents are shared by you, where and when you choose. HOW IT WORKS 1. Type the CAN, the 6-digit code printed on the front of the card, bottom right. 2. For the address or for signing, also enter the 4-digit PIN that came with the card. 3. Hold the card flat against the top of the phone, on the back, until the read finishes. 4. Export the PDF, sign the document or save the read to history. LANGUAGES Romanian, English, German, Italian, French, Spanish, Hungarian, Ukrainian, Turkish, Arabic, Hindi, Urdu and Chinese. REQUIREMENTS • iPhone with NFC (iPhone 7 or later), iOS 16.4 or later. • The Romanian electronic identity card (the chip model, issued since 2021). The old card has no chip. • The CAN printed on the card. For the address and for signing, the 4-digit PIN. TIPS • Remove thick cases and keep the card still until the read completes. • After 5 wrong PINs the card locks and can only be unlocked at the registry office. The app never retries on its own. Guides and FAQ: ceireader.ro Independent, privately developed app. Not affiliated with the Romanian Ministry of Internal Affairs, DGEP or any other public institution. The signature created in the app is an advanced electronic signature made with the certificate on your own card; qualified signatures are available only through the state's official services.