Comparison

Desmos Test Mode vs CK

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

Head to head
About

Desmos Test Mode

This app provides restricted versions of graphing and scientific calculators designed to meet exam requirements. It allows users to practice for specific state or national assessments by selecting the appropriate test mode. Full, unrestricted calculator features are available in separate applications.

Highlights
  • Exam-compliant calculator modes
  • Graphing capabilities
  • Scientific calculator functions
  • Data tables and statistics
  • Interactive sliders
  • Points of interest on graphs
Read full description

** These are restricted versions of the Desmos Calculators that comply with exam requirements. To prepare for specific state or national assessments, select the corresponding test from the menu in the app. Find out whether Desmos is used for your test at www.desmos.com/testing. If you’d like to use full, unrestricted versions of the calculators, download the Scientific or Graphing Calculator apps or visit www.desmos.com. ** At Desmos, we imagine a world of universal math literacy where math is accessible and enjoyable for all students. To that end, we’ve built simple yet powerful calculators. They’re intuitive, beautiful, and completely free. - - - Graphing Calculator Features: Graphing: Plot polar, Cartesian, and parametric graphs. There’s no limit to how many expressions you can graph at one time—and you don’t even need to enter expressions in y= form! Sliders: Adjust values interactively to build intuition, or animate any parameter to visualize its effect on the graph. Tables: Input and plot data, or create an input-output table for any function. Statistics: Use regressions to find the lines (or other curves!) that best fit your data. Zooming: Scale the axes independently or at the same time with the pinch of two fingers, or edit the window size manually to get the perfect view of your graph. Points of Interest: Touch a curve to show its maximum and minimum values, intercepts, and points of intersection with other curves. Tap any of these points of interest to see their coordinates. Hold and drag along a curve to see the coordinates change under your finger as you trace. - - - Scientific Calculator Features: Variables: Assign values to variables that you can use in other expressions. Since all of your work is held in the expressions list, you can compute a value once and use it in many places simultaneously. Take advantage of the “ans” key, which always stores the value of the previous expression. Arithmetic: Beyond the four basic operations, the scientific calculator also supports exponentiation, radicals, absolute value, logarithms, rounding, and percentages. Trigonometry: Evaluate the fundamental trigonometric functions and their inverses using either radians or degrees for angle measure. Statistics: Compute the mean and standard deviation (sample or population) of a list of data. Combinatorics: Count combinations and permutations and calculate factorials. - - - Four-Function Calculator Features: Simple and Beautiful: Just the basics done right. Add, subtract, multiply, divide, and take square roots. Multiple Expressions: Unlike many four-function calculators, all of your previous work remains visible on the screen. The special “ans” key always holds the value of the previous computation (and updates automatically!), so you never have to remember or copy a result.

About

CK

This app offers a secure and filtered internet browsing experience for iOS users, ensuring CIPA compliance for educational institutions. It provides granular, identity-based reporting and policy-driven web access control, whether users are on-premises or traveling globally.

Highlights
  • Secure internet browsing
  • Identity-based reporting
  • Policy-based filtering
  • CIPA compliance
  • Global web access control
  • MDM deployment
Read full description

The ContentKeeper CK-AUTH App provides users with a protected Internet browsing experience in conjunctions with the ContentKeeper Secure Internet Gateway (CK-SIG) system. The App provides for highly granular users-identity based reporting along with single sign-on support. User access to Internet resources are controlled by a sophisticated policy-based filtering engine. Features :- • Allows iOS users to have the same level of filtered and controlled web browsing access when either on-premises or travelling globally • Provides for policy-based high performance visibility of all web traffic and search engine activity • Ensures CIPA compliance for the education sector The system is easily deployed via a supported MDM system to the iOS endpoints. The system automatically detects when an iOS device is on-network or mobile and adjusts accordingly. The app does not involve the use of a Proxy server. Note: ContentKeeper Secure Web Gateway V190 or above and associated licence subscription is required.

Screenshots

Desmos Test Mode4 screens
CK1 screens

Verdict

The call

The clearest difference is review sentiment: Desmos Test Mode at 17% against CK's 0%. Desmos Test Mode also leads on ratings volume (368 vs 18) and rating (1.6 vs 1.4). CK's advantage is iOS requirement (14.0 vs 16.0). 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

Desmos Test Mode holds the better App Store score, 1.6 against 1.4. That said, the two scores are not equally well evidenced: Desmos Test Mode has 368 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 17% of Desmos Test Mode's written reviews are positive against 0% of CK's.

UpkeepUpdate frequency

Desmos Test Mode ships an update every 4 months, CK every 9 months. The most recent releases landed on September 10, 2026 and July 18, 2026 respectively.

Scorecard5 real differences · 5 level
Desmos Test Mode versus CK: the parameters behind the verdict, then further details
ParameterDesmos Test ModeCK
PriceFreeFree
Rating1.6 (368 ratings) — better1.4 (18 ratings)
Positive reviews16.5% of reviews — better0.0% of reviews
Number of ratings368 — better18
Update frequencyEvery 4 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.014.0 — better
Further details — not scored
Size6 MB2 MB
Age rating4+4+
DeveloperDesmosContentKeeper Technologies

Customer experience

Desmos Test Mode

All ratings368 ratings
Positive14.4%
Neutral2.4%
Negative83.2%
Written reviews139 reviews
Positive16.5%
Neutral5.0%
Negative78.4%

CK

All ratings18 ratings
Positive11.1%
Neutral0.0%
Negative88.9%
Written reviews5 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Desmos Test Mode

Reported bugs

3 issues
  • App crashes and freezes during use
  • Unexpected phone behavior and lockouts
  • Compatibility issues across different devices and OS versions

Requested features

3 requests
  • Add customization options for the calculator interface
  • Improve compatibility with older devices
  • Provide more flexible calculator modes during tests

CK

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Desmos Test Mode

No in-app purchases

None

CK

No in-app purchases

Questions

Is Desmos Test Mode free?
Desmos Test Mode is free to download, with no in-app purchases.
Is CK free?
CK is free to download, with no in-app purchases.
Which has better reviews, Desmos Test Mode or CK?
Desmos Test Mode is rated higher. Desmos Test Mode averages 1.6 out of 5 from 368 ratings, while CK averages 1.4 from 18 ratings.
Do Desmos Test Mode or CK have ads?
Neither Desmos Test Mode nor CK shows ads.
Which is updated more often, Desmos Test Mode or CK?
Desmos Test Mode ships an update every 4 months, and CK every 9 months. Most recently, Desmos Test Mode was updated on September 10, 2026 and CK on July 18, 2026.

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