Calculator +ㅤ vs Standard Deviation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator +ㅤ
This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.
- Snap and Scribble Calculator
- Basic Calculator
- Scientific Calculator
- Fraction Calculator
- Currency Converter
- Calculation History
- Customizable Themes
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Calculator + App, the simplest way to make Math easy! Whether it's basic, scientific, fractions or even solving a problem you take a picture of. We've got you covered! • Snap and Scribble Calculator (NEW!) • Optimized for iPhone & iPad • Basic Calculator • Scientific Calculator • Fraction Calculator • Currrency Converter • Calculation History • Customize with Themes • Simple & Intuitive Design Introducing Rocket Apps PRO: With Rocket Apps PRO you simply subscribe once and get access to all supported Rocket Apps. The best part: we will keep adding new Apps. SUPPORT Our goal is to build the best apps in the world. You can help us by reporting bugs and requesting features via Email: help@rocketapps.com TERMS & PRIVACY https://rocketapps.com/privacy.html https://rocketapps.com/terms.html SUBSCRIPTION TERMS: The App offers an auto-renewing monthly or yearly subscription to provide you with unlimited access to all PRO Features while you maintain an active subscription. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable.
Standard Deviation
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SD calculator is an iOS application developed for the calculation of standard deviation problems. It includes entering data values and selecting the type of standard deviation i.e. sample or population. Features of standard deviation calculator Design The design of this application is unique and its style and theme are attractive. This app is designed to top all the other apps out there in the design department. Input field The input field is easy to use to enter data and get the result. Simply, add the comma-separated values and choose the type of standard deviation. Multiple options There are multiple options available in this application as you can get the mean, sample standard deviation, population standard deviation, deviation (difference of data values from the mean), square of deviation, sample variance, and population variance. Results The step-by-step solution will be provided just after hitting the calculate button for the sample and population data. This will help you to ease up the lengthy and time-consuming calculation in a fraction of a second. How to use a standard deviation calculator? This application is easy to use, but just in case you need a guide, here it is. • First of all, enter the comma-separated values into the input box. • Select the type of the standard deviation i.e. sample or population. • Press the calculate button. • The step-by-step result will show just after pressing the calculate button • Hit the reset button to enter new data.
Screenshots
Verdict
The clearest difference is in-app purchases: Standard Deviation at none against Calculator +ㅤ's 6. Standard Deviation also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Calculator +ㅤ's advantage is update cadence (fortnightly vs every 2 months). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Standard Deviation asks for nothing beyond the download.
Calculator +ㅤ ships an update fortnightly, Standard Deviation every 2 months. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.
| Parameter | Calculator +ㅤ | Standard Deviation |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (4.6K ratings) — better | — |
| Positive reviews | 46.7% of reviews | — |
| Number of ratings | 4.6K — better | — |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Rocket Apps GmbH | Ahmad Sattar |
Bugs and requests
Calculator +ㅤ
Reported bugs
3 issues- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized
Requested features
4 requests- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature
Standard Deviation
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator +ㅤ
- Rocket Apps PRO Weekly3 Days trial$2.997 Days
- Rocket Apps PRO Monthly3 Days trial$4.991 Month
- Rocket Apps PRO Yearly3 Days trial$9.991 Year
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- Rocket Apps PRO Offer1 Year trial$19.991 Year
- Rocket Apps PRO Yearly3 Days trial$19.991 Year
- Rocket Apps PRO Yearly3 Days trial$29.991 Year
Standard Deviation
No in-app purchases
Questions
Is Calculator +ㅤ free?
Is Standard Deviation free?
Do Calculator +ㅤ or Standard Deviation have ads?
Which is updated more often, Calculator +ㅤ or Standard Deviation?
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