A Free Desmos Alternative: Plotline Compared
Plotline is a free alternative to Desmos for everyday graphing and calculation: it plots equations, inequalities and polar curves with sliders, needs no account, and works offline, but it has no 3D, geometry or classroom tools.
At a glance
| What it is | Looking for a Desmos alternative? Plotline is a free graphing, scientific and matrix calculator with no sign-up. See what it does and where Desmos does more. |
|---|---|
| Type | Page |
| Price | Free, with no account or sign-up |
| Works offline | Yes, after the first visit; installs as an app |
| Made by | Aalok (aalok.builds@gmail.com) |
| Last updated | 1 November 2026 |
Plotline and Desmos side by side
| Feature | Plotline | Desmos |
|---|---|---|
| Price | Free | Free |
| Graphing equations, inequalities, polar and parametric curves | Yes | Yes |
| Sliders | Yes | Yes |
| Scientific, four-function and matrix calculators | Yes | Yes |
| Saving graphs | In your browser, no account | With a free account |
| Sharing a graph | By link | By link |
| Install and offline use | Installs from the browser and works offline | Mobile apps |
| 3D graphing and geometry | Not available | Available |
| Tables and regressions | Not available | Available |
| Classroom activities | Not available | Available |
| Exam use | Not designed for exams | Test mode, and built into the digital SAT |
When Plotline is a good fit
Plotline suits students who want to open a calculator and start straight away. There is nothing to sign up for, saved graphs stay in your own browser, and the on-screen keypad and one-click examples help if you have never used a graphing calculator before.
Every calculator and guide also works after the first visit without an internet connection, and the site can be installed on a phone or computer like an app.
When Desmos is the better choice
Use Desmos if you need 3D graphs, geometry constructions, data tables or regressions, or if your teacher runs class activities on it. If you are preparing for an exam that includes Desmos, practice on Desmos itself so that you know the exact tool you will use on test day.
Frequently asked questions
Is Plotline the same as Desmos?
No. Plotline is an independent project with its own design and code, and is not affiliated with or endorsed by Desmos. It covers everyday graphing and calculation, while Desmos adds 3D, geometry, tables and classroom tools.
Do I need an account to save my graphs?
No. Plotline saves graphs in your browser on your device. To move them to another device, export them as a file or share a link.
Can I use Plotline in an exam?
Plotline is not designed or approved for exams, and most exams require a specific approved calculator. Check your exam board’s rules first, and practise on the calculator you will actually be allowed to use on the day.
Is it free?
Yes. Every Plotline calculator is free, with no account, no sign-up and no ads inside the calculators.
Related
- Graph Library – Interactive graphs of linear, quadratic, cubic, absolute value, square root, exponential, log, trig and polar functions.
- Sine graph – Graph y = sin(x) online.
- Parabola (quadratic) – Graph quadratic functions y = ax² + bx + c online.
Free calculators
- Graphing Calculator – Graph functions, circles, inequalities, polar and parametric equations instantly.
- Scientific Calculator – Free online scientific calculator with sin, cos, tan, inverse trig, logs, powers, roots, factorials, degrees and radians.
- Basic Calculator – A simple, free online calculator for add, subtract, multiply, divide, percent, square and square root.
- Matrix Calculator – Free matrix calculator: determinant, inverse, multiplication, transpose, RREF, rank, trace and powers, with exact fractions.
Plotline is an independent project and is not affiliated with Desmos, Texas Instruments or Casio.