Standard Deviation
Guide
Standard deviation calculator for Android
If you search for a standard deviation calculator on a phone, you usually need four things: paste a list, pick sample or population, see the working, and keep the numbers without creating an account.
What the task actually is
A web form is fine at a desk. On Android you often have a list in Notes, a lab sheet photo you already typed, or a homework prompt with commas. The useful app is the one that accepts that list and shows s or σ without hiding the table.
A practical checklist
- Sample (n − 1) and population (N) as an explicit switch, not a hidden default.
- A solution table: mean, deviations, squares, variance, square root.
- Related stats you will be asked for anyway: mean, variance, range, maybe IQR and CV.
- History that stays on the device if you do not want cloud homework.
Other approaches
A TI-84 style STAT → CALC → 1-Var Stats path still works: Sx is sample, σx is population. A four-function calculator can use the computational formula by hand. A website calculator is fine when you are already at a laptop. An Android app is for the list that is already on the phone.
How this app maps to the checklist
Standard Deviation Calculator by TQ Tech is that Android app: paste commas, spaces, or new lines; switch Sample and Population; Show solution; graphs; local history. Core calculation is free. Ads appear on the free tier. Lifetime Pro is a one-time Play purchase that removes ads, keeps 8 decimal places without a video, and unlocks PDF export. It is not a subscription.
Grouped frequency tables are a special case: this calculator expects a raw list. Expanding counts into a list (10, 10, 10, 12, …) is the honest way to use it on grouped data.
Get Standard Deviation Calculator on Google Play
Related guides
FAQ
More answers live on the homepage FAQ.