Side by side

Grasple vs Principia

Both stand on math learning apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Grasple

Free plan Web

Choose Grasple if you need math or statistics practice with editable open resources, immediate feedback and learning analytics. The free account is capped at 100 unique students, while the Full Teacher Account charges per teacher and student seat; larger institutions may need to ask about the unpriced Institutional Account.

Visit Grasple

Principia

Free plan AndroidiPhoneMac

Principia offers a structured mathematics curriculum with visual, step-by-step lessons and a free starting tier. Learners needing the complete sequence must choose a paid monthly or annual plan.

Visit Principia

The facts

	Grasple	Principia
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Web	Android, iPhone, Mac
Lowest paid plan	Free or on request	Principia Pro Annual: $49.99 a year
Plans published	3	4
Maker	Grasple	Not published
Website	grasple.com	getprincipia.com
On math learning apps	#31 of 122	#27 of 122

Grasple: what it does well

Free open-license exercises support classroom use.
Students receive immediate feedback on interactive practice.
Teachers can adapt resources or create their own.
Equivalent algebraic answers can be recognized by its Computer Algebra System.
Learning Analytics dashboards highlight difficult concepts.

What to know first

The free account is limited to 100 unique students.
The Full Teacher Account has a six-course limit.

Principia: what it does well

Covers eight tiers and 93 mathematical concepts
Animated visualizations support guided learning
Free plan includes 15 concepts
Works on iOS and macOS
Paid users can sync progress across devices

What to know first

Free plan locks Tiers 3–8
Paid access starts at $6.99 a month
Device syncing requires a paid account

Alternatives to Grasple Alternatives to Principia The whole list