Comparison

Standard Deviation vs Athlon Ballistics

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Standard Deviation

Easily calculate standard deviation with this iOS app. Enter your data values, choose between sample or population calculations, and get step-by-step results instantly. It offers a unique and attractive design for a seamless user experience.

Highlights
  • Calculate sample and population standard deviation
  • Enter comma-separated data values
  • View step-by-step solutions
  • Calculate mean, deviation, and variance
  • Unique and attractive design
  • Reset function for new data
Read full description

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.

About

Athlon Ballistics

This app provides advanced ballistic solutions and integrates with thermal devices to upload ballistic data. It allows users to manage rifle and bullet profiles, customize reticles, and create holdovers directly on compatible thermal scopes and clip-ons.

Highlights
  • Advanced ballistic solutions
  • G1/G7 factory cartridge library
  • Upload data to thermal scopes
  • Thermal control interface
  • Set rifle and bullet profiles
  • Create BDC holdovers
Features
Read full description

Athlon Ballistics is the companion app for Athlon Optics shooters. Use it with your Athlon chronograph, with supported Athlon thermal scopes and clip-ons, or on its own as a ballistic calculator. CHRONOGRAPH • Connects to your Athlon chronograph over Bluetooth, automatically when it is near. • Live screen: see the velocity of every shot as you fire, with average, extreme spread (ES), standard deviation (SD), maximum, minimum and energy. • Name each session, add notes, and link it to a rifle and a bullet. • Compare and merge sessions. • Sessions sync to your account and come back on a new phone. • Export sessions to a spreadsheet and share them. • Update the chronograph firmware from the app. BALLISTIC CALCULATOR • Firing solutions with G1 and G7 drag models. • A library of factory cartridges and bullets. Add your own bullet with its BC, weight and length. • Rifle and bullet profiles with sight height, twist rate and zero distance. • Live local weather for the solution, or enter the conditions yourself. • Ballistic charts with your own ranges and steps. Export them to a spreadsheet. ATHLON RETICLES • See your hold on the real Athlon reticle for your scope. ATHLON THERMAL SCOPES • Quick Connect: pick your supported Athlon thermal scope or clip-on, including the new Athlon DCM, and the app joins its Wi-Fi network for you. • Live view from the scope. On supported scopes, take photos and videos that save to the scope's card, then save them to your phone from the scope's album. • Send rifle and bullet profiles to the scope's ballistic calculator. On DCM scopes, holdover marks come from your profiles. • Change reticle type and color, and set BDC holdovers on supported scopes. YOUR DATA • Sign in with email, Google or Apple. Profiles and sessions stay with your account. • Imperial and metric units. English, German, French, Spanish and Italian. • Delete your account from the app at any time. HELP Open Help in the app, or send us feedback from the app. You can also email contact@athlonoptics.com.

Screenshots

Standard Deviation4 screens
Athlon Ballistics4 screens

Verdict

The call

The clearest difference is rating: Athlon Ballistics at 4.6 against Standard Deviation's 1.0. Athlon Ballistics also leads on ratings volume (45 vs 1) and update cadence (monthly vs every 2 months). Standard Deviation's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Athlon Ballistics holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Athlon Ballistics has 45 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Standard Deviation ships an update every 2 months, Athlon Ballistics monthly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
Standard Deviation versus Athlon Ballistics: the parameters behind the verdict, then further details
ParameterStandard DeviationAthlon Ballistics
PriceFreeFree
Rating1.0 (1 ratings)4.6 (45 ratings) — better
Positive reviews—16.3% of reviews
Number of ratings145 — better
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size21 MB162 MB
Age rating4+4+
DeveloperAhmad SattarSportsgear Outdoor Products LLC

Bugs and requests

Standard Deviation

Not enough reviews yet to summarise bugs or requests.

Athlon Ballistics

Reported bugs

33 issues
  • App will not sync sessions
  • Exported data has incorrect/reverted session names and variables
  • App will not open on iPhone
  • App crashes when using specific reticles
  • Cannot enter elevation or DA
Show 28 more
  • App won't stay connected to chronograph
  • Firmware update freezes
  • Chronograph not recognized as a hard drive on Windows
  • App freezes during firmware updates
  • Chronograph locks up when syncing
  • Bluetooth connection fails
  • QR code scan opens wrong app store
  • Login button is grayed out
  • Cannot create an account
  • Password complexity rules are restrictive
  • Keyboard covers input fields
  • Data disappears after updates
  • App crashes when loading scope reticles
  • Unable to add rifle or bullet profiles
  • App freezes at 50% or 76% during device update
  • Syncing locks up the chronograph
  • App doesn't sync majority of range sessions
  • Notes section is hidden by keyboard
  • App shows CSS on screen during signup/login
  • App not working on specific iPhone models
  • App locks up
  • Cannot update chronograph software
  • App doesn't allow creating a standalone login
  • App doesn't allow custom naming for bullet profiles
  • App doesn't sync all sessions
  • Chronograph freezes when connected to app
  • App doesn't allow manual entry of projectile data
  • App doesn't allow editing projectile data

Requested features

18 requests
  • Add more ammo/bullet profiles (Barnes, etc.)
  • Expand projectile data beyond G1 (e.g., G7)
  • Allow manual entry of projectile data
  • Improve user interface for reloaders
  • Add support for air rifles/air guns, bows, crossbows
Show 13 more
  • More reticle options
  • Ability to view sessions without being connected
  • Bulk export of shot strings
  • Longer names for guns/ammo
  • Add elevation function
  • Add pistol data support
  • Option for peep or other iron sights
  • More intuitive and ergonomic navigation
  • Add support for non-Athlon scopes
  • Improve data management and organization
  • Dedicated app for chronograph data download/storage
  • Allow custom naming for bullet profiles across platforms
  • Take pictures of groups with data

In-app purchases

None

Standard Deviation

No in-app purchases

None

Athlon Ballistics

No in-app purchases

Questions

Is Standard Deviation free?
Standard Deviation is free to download, with no in-app purchases.
Is Athlon Ballistics free?
Athlon Ballistics is free to download, with no in-app purchases.
Which has better reviews, Standard Deviation or Athlon Ballistics?
Athlon Ballistics is rated higher. Standard Deviation averages 1.0 out of 5 from 1 ratings, while Athlon Ballistics averages 4.6 from 45 ratings.
Do Standard Deviation or Athlon Ballistics have ads?
Neither Standard Deviation nor Athlon Ballistics shows ads.
Which is updated more often, Standard Deviation or Athlon Ballistics?
Standard Deviation ships an update every 2 months, and Athlon Ballistics monthly. Most recently, Standard Deviation was updated on November 3, 2026 and Athlon Ballistics on October 30, 2026.

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