Comparison

Trigonometry calc vs Circle & Sphere

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

Head to head
About

Trigonometry calc

Calculate side lengths and angles in right-angled triangles using Pythagorean theorem and trigonometry functions. Learn basic trigonometry concepts. An optional premium version removes ads and unlocks a general triangle calculator.

Highlights
  • Calculate side lengths
  • Calculate angles
  • Pythagorean Theorem
  • Trigonometry functions
  • Learn simple trigonometry
  • General triangle calculator (premium)
Features
Read full description

Use Trigonometry Calc to calculate sidelengths and angles in the right angled triangle. By the help of Pythagorean Theorem and some trigonometry functions you can in this app calculate side lengths and angles in any right angled triangle. Learn simple trigonometry. •Math •Trigonometry •Pythagorean Theorem Trigonometry Premium Go ad-free forever and unlock the advanced General Triangle Calculator (SAS/SSA/ASA). Solve any triangle, not just right triangles

About

Circle & Sphere

Instantly solve geometry problems for homework and exams. Calculate circle and sphere properties with step-by-step solutions. Access learning videos and manage your calculations.

Highlights
  • Circle calculations (radius, diameter, circumference, area)
  • Sphere calculations (surface area, volume)
  • Circular sector calculations
  • Step-by-step solutions
  • Learning videos
  • Solution management
Features
Read full description

Do your homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter your values and calculate: - Circle: radius, diameter, circumference and area - Sphere: surface area and volume - Circular sector: arc length and central angle HOW IT WORKS Enter your values in the correct fields and get started. You receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. We cannot identify you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps always remain complete. If you need many solutions in a short time, various purchase options are available. EXTRAS - Overview of all measures - all length units - curated learning videos - feedback for incorrect inputs - manage your own solutions - app introduction CONTACT Questions and feedback via Discord or directly in the app review.

Screenshots

Trigonometry calc4 screens
Circle & Sphere4 screens

Verdict

The call

The clearest difference is review sentiment: Circle & Sphere at 100% against Trigonometry calc's 0%. Circle & Sphere also leads on rating (4.0 vs 3.0) and ads (none vs shown). On price, ratings volume, 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. Trigonometry calc sells 1 one-off in-app purchase and Circle & Sphere sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Circle & Sphere holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 0% of Trigonometry calc's written reviews are positive against 100% of Circle & Sphere's.

UpkeepUpdate frequency

Trigonometry calc ships an update every 3 months, Circle & Sphere every 3 weeks. The most recent releases landed on October 18, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
Trigonometry calc versus Circle & Sphere: the parameters behind the verdict, then further details
ParameterTrigonometry calcCircle & Sphere
PriceFreeFree
Rating3.0 (2 ratings)4.0 (4 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings24 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size10 MB180 MB
Age rating4+4+
DeveloperBo KalvslundGlindemann, Sennoun, Langer GbR

Customer experience

Trigonometry calc

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews6 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Circle & Sphere

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Trigonometry calc

One-time1
  • Premium$0.99
8 purchases

Circle & Sphere

One-time8
  • +30 User Tokens$0.29
  • +1 Convenience Token / 6h, max. +2$0.59
  • +2 Convenience Tokens / 6h, max. +4$0.99
Show 5 more
  • +150 User Tokens$0.99
  • +300 User Tokens$1.49
  • +4 Convenience Tokens / 6h, max. +8$1.59
  • Remove Ads$2.99
  • Lifetime Access$2.99

Questions

Is Trigonometry calc free?
Trigonometry calc is free to download, with in-app purchases available.
Is Circle & Sphere free?
Circle & Sphere is free to download, with in-app purchases available.
Which has better reviews, Trigonometry calc or Circle & Sphere?
Circle & Sphere is rated higher. Trigonometry calc averages 3.0 out of 5 from 2 ratings, while Circle & Sphere averages 4.0 from 4 ratings.
Do Trigonometry calc or Circle & Sphere have ads?
Trigonometry calc shows ads; Circle & Sphere does not.
Which is updated more often, Trigonometry calc or Circle & Sphere?
Trigonometry calc ships an update every 3 months, and Circle & Sphere every 3 weeks. Most recently, Trigonometry calc was updated on October 18, 2026 and Circle & Sphere on October 2, 2026.

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