Monthly Archives: February 2014

Amino Acids v. 1.1

A new version of Amino Acids Structures and Names was approved on Monday, simultaneously with the Inorganic acids app. That’s why I decided to write about the new app first.

There are several improvements and changes. I added the Main Menu, so now the user can choose between 5 modes: 1) names of 22 proteinogenic amino acids; 2) their abbreviations; 3) 22 flashcards on them; 4) other related compounds, such as dipeptides and non-proteinogenic amino acids; 5) 19 flashcards about these other compounds.

I added German, French, Spanish, Portuguese, and Italian localizations. Translating the app into these languages proved to be beneficial for the Hydrocarbons app.

Advertisements

Leave a comment

Filed under Chemistry, Updates

Inorganic Acids, Polyatomic Ions and Potassium Nitrate

My new app is called Inorganic Acids, Polyatomic Ions and Potassium Nitrate. Hopefully, it will be useful for everyone who studies inorganic chemistry.

The English description:

Learn names and formulas of all important inorganic acids, polyatomic ions and their salts. An app is suitable for everyone: from high school students to chemistry professors.
Take a quiz or use the table as a reference.

* 70+ inorganic acids: from Sulfuric H2SO4 to Hydrazoic HN3
* 50+ anions and cations: from Chloride Cl to Hydrazinium N2H5+
* 50+ salts: from Potassium nitrate KNO3 to Ammonium hexachloroplatinate (NH4)2PtCl6

*****

New features:
– Table prepared with iOS standard elements
– Rate App button
– New smaller Open / Remove Letters buttons
– The app icon resembles a safety diamond (shows how dangerous a particular chemical compound is)
– Entering chemical formulas as answers. I even didn’t use subscripts, because in the Georgia fonts, digits are already smaller than letters.
– “Acidic” colors are used in design
– Only first 2 modes and a table are available for free. Six others modes can be purchased just for $0.99 together with removing the ads banner.

3. Acknowledgements:
icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

1 Comment

Filed under Chemistry

Hydrocarbons 1.1

The new version of the Hydrocarbons app has been approved after 6 days of waiting and just 1 min of reviewing.

The major reason of the update was to add “promo nodes” (links after questions) to my recent apps. I moved the “Watch Ads” button from the Settings to the game as well, though it seems that the whole idea with interstitial screen ads doesn’t pay off in my case. There are several minor fixes in chemical formulas in their style or sizes. In the main menu, I highlighted that two locked modes (“Dienes & Polyenes” and “Polycyclic Aromatic Hydrocarbons”) can be unlocked (= bought) in Settings. The word “Buy” near an inactive button was a bit confusing. The letter keys were made bigger in case of iPhone/iPod. The sounds of correct letters now grow in their pitch which is not as monotonous as it was in 1.0.

Leave a comment

Filed under Chemistry, Developer Blog

SI Unit Prefixes

The idea of an app about SI Unit Prefixes came to me several months ago. I registered it at the iTunes Connect in September. At last, it’s here for everyone to enjoy.

The English description:

How many meters are in 1 nanometer? How many vertices does Dodecahedron have? Is 1 Mebibyte bigger than 1 Megabyte?
This app will help you to answer these and many other questions about decimal, binary, and number prefixes. It has a complete list of prefixes approved for SI units.

Please check 5 Tables and 5 Quizzes:
* Decimal Multiple: kilo-, Mega-, Giga-, etc.
* Decimal Fractional: milli-, micro-, nano-, etc.
* Number Latin: uni-, bi-, ter-, quart-, quint-, etc.
* Number Greek: mono-, di-, tri-, tetra-, penta-, etc.
* Binary: kibi-, mebi-, gibi-, etc.

A quick reference and an easy way to learn this information essential for everyone studying math, computer science, physics, and chemistry.

*****

1. This app was uploaded several hours after Heterocyclic Compounds, they got into the review simultaneously, and SI Prefixes were approved 7 minutes before Heterocycles.

2. New features:
– This is my first app in the category Reference. Actually, after analyzing how the main page for each category is filled on the App Store, I’m leaning towards publishing all my apps as Games. To get on the first page of Education or Reference Apps, your app has to be picked up by Apple editors. In case of Games, all new free games get into the “New Free” bar.
– Tables show all question / answer pairs. It’s not only convenient for users, but helped me to check all errors and typos quickly during the development.

3. Acknowledgements:
icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

Leave a comment

Filed under Developer Blog, Games

Heterocyclic Compounds

My third chemical app – Heterocyclic Compounds.

The English description:

Heterocycles are parts of:
* Biomolecules (nucleic bases in your DNA and RNA; amino acids Histidine and Tryptophan)
* Important drugs (80% of top-selling drugs contain heterocycles: benzodiazepines, quinine, penicillin, etc.)
* and even Food (sugar has heterocyclic rings too!)

That’s why it’s so useful to know the structures of major heterocyclic compounds for molecular biologists, pharmacists, organic chemists and for general public interested in what the stuff is made from.

This app is the unique place to learn the structures and names of 80+ heterocycles.

* Entertaining letter quiz ‘Structure – Name’
* Nitrogen, oxygen, and sulfur heterocycles
* Everything from Purine to Pyridine

*****

1. This app has a bit aggressive “watermelon” design and its goal is not only to teach millions of iOS users about heterocyclic structures but also test the simplest possible “letter quiz” model. There is one linear mode. No flashcards, no tables. The IAP just removes the ad banner.

The review time now is slightly longer than 1 week.

2. Features:
– One linear mode of 81 heterocycles with random questions after finishing the whole sequence
– English and Russian localizations
– Games – Educational / Word category

3. Acknowledgements:
icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

Leave a comment

Filed under Chemistry

Amino Acids Structures and Names

My second chemical app Amino Acids Structures and Names was approved less than in one week after the first one about Hydrocarbons. This time there have been no problems during the submission / review process at all.

The English description of the app:

Do you know the chemical formula of glycine?
Btw, the knowledge of structures and names of amino acids – building blocks of proteins and peptides – are important not only for chemists, but also for biologists, pharmacists, and just for everyone studying science and/or medicine. This app is the easiest and the most efficient way to learn the structures, codes, and properties of 20 standard amino acids and 14 related compounds.

*****

* ‘Structure – Name’ Quiz
* Flashcards – Rate each card to adjust to your level of knowledge
* All 22 proteinogenic Amino Acids (20 standard + Selenocysteine and Pyrrolysine)
* Colorful structural formulas
* Three- and One-letter codes (abbreviations)
* Isoelectric points (pI)
* Essential Amino Acids
* Polar and Hydrophobic Amino Acids
* Unnatural Amino Acids such as D-Alanine
* Dipeptides such as Aspartame*

*****

It is a perfect app for everyone studying:

* Biochemistry
* Organic Chemistry
* Molecular Biology


*****

New features:
– It can be also called my first biochemical app.
– Flashcards mode – the player sees a formula or a name of an amino acid, tries to remember what’s the missing info is, checks “Show an Answer” and finally rates how well he/she knows this particular amino acid (from 1 – not at all – to 5 – very well). The probability of this card to be shown again depends on this rating.
– The IAP is associated with flashcards. There are 34 compounds in the app and only 10 cards are available for free. To get them all, one has to buy “All flashcards & Remove Ads”.
– “Promo buttons”:
a) instead of the “More Games” list in Settings, I have a direct link to Hydrocarbons and other apps from the game. The button shows up after answers to certain questions.
b) The button “Watch Ads” was moved from Settings to the game as well. It shows an AdMob interstitial, gives hints for this, and disappears.
– So far it was localized only to English and Russian but I do have plans to add at least German, Spanish, and Italian in future updates.
– I may called it “a game” but it’s my first app in the Education category.

3. Acknowledgements:
icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

Leave a comment

Filed under Chemistry