Calculator + vs Trig Solver
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator +
This app offers a free basic and scientific calculator with an elegant interface. Upgrade for advanced features like graphing, equation solving, and unit conversions. Supports fractions, percentages, and multiple themes.
- Free basic and scientific calculator
- Elegant and intuitive interface
- Advanced editing and equation display
- Fraction and percent support
- Graphing and equation solving
- Base converter and multiple themes
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Award winning calculator app for iPad and iPhone. Designed with simplicity, usability and beauty in mind! FEATURES: - Free basic calculator - Free scientific calculator - Elegant & Intuitive interface - Advanced editing by easily going back and forth - Displays both the equation & the result at the same time - Supports Fraction & Percent - Supports many scientific functions If you are looking for more advanced features you can upgrade to one or more of the following: - Fraction Calculator with feet, inches & cm support! - Solving for x with a polynomial Calculator for solving quadratic & cubic equations 2x³ - 4x² - 22x + 24 = 0 - Linear Equations Solver for solving system of linear equations 2x – y = 9 3x + 4y = –14 - Graphing Calculator to find the local min, max & intersection points y = 2x³ – 4x (x² + y²)³ = -27y²x² - Triangle Calculator - Cone Calculator - Arc Calculator - Circle Calculator - Base Converter ( HEX OCT BIN DEC ) - Multiple themes Enjoy the FREE Scientific calculator on your iPhone & iPad. If you like it, support us by upgrading or giving us a positive review. Thanks :) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Trig Solver
This application calculates unknown sides and angles of both regular and right triangles. It supports various input combinations, including two sides and an angle, two angles and a side, three sides, or two sides and an angle for right triangles.
- Regular triangle solver
- Right triangle solver
- Calculate with 2 sides and an angle
- Calculate with 2 angles and a side
- Calculate with 3 sides
- Calculate with side and angle (right triangle)
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A Triangle Solver that has a regular triangle solver as well as a right triangle solver. Regular Triangle - Enter one of the following and hit Calculate: 2 sides and an angle 2 angles and a side 3 sides Right Triangle - Enter one of the following and hit Calculate: 2 sides a side and an angle
Screenshots
Verdict
The clearest difference is in-app purchases: Trig Solver at none against Calculator +'s 10. Trig Solver also leads on ads (none vs shown) and iOS requirement (9.0 vs 16.4). Calculator +'s advantage is update cadence (every 5 days vs every 28 months) and ratings volume (10K vs 80). On price and device support 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
Both are free to download. Calculator + sells 10 in-app purchases, starting at $4.99 per month. Trig Solver asks for nothing beyond the download.
Calculator + holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 80, so its average is the more settled of the two. Written reviews point the same way: 85% of Calculator +'s written reviews are positive against 74% of Trig Solver's.
Calculator + ships an update every 5 days, Trig Solver every 28 months. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.
| Parameter | Calculator + | Trig Solver |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (10K ratings) — better | 4.3 (80 ratings) |
| Positive reviews | 84.9% of reviews — better | 74.1% of reviews |
| Number of ratings | 10K — better | 80 |
| Update frequency | Every 5 days — better | Every 28 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 9.0 — better |
| Further details — not scored | ||
| Size | 50 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | xNeat.com | Creature Code Mobile, LLC |
Customer experience
Calculator +
Trig Solver
User reviews
Calculator +
From 10K App Store ratingsWhat we love
- 👍 Great features and easy to use
- 👍 Efficient and quick
- 👍 Versatile, functional calculator
- 👍 Fantastic, easy to use app
- 👍 Awesome calculator app
Room to improve
- 🐛 New updated layout is awful
- 🐛 App is now terrible
- 🔒 Paying customer screwed over by update
- 🔒 Now timed trial, no free w/ads version
- 🔒 Not honest
Trig Solver
From 80 App Store ratingsWhat we love
- 👍 Simple and easy to use
- 🚀 Fast calculations
- ✅ Accurate results (for many users)
- 💡 Useful for schoolwork
- 🛠️ Great for job site/machinists
Room to improve
- 🐛 Inaccurate results reported
- 💸 Ads are present and distracting
- 📉 Rounding issues
- 🚫 No option to remove ads (for some)
- ⚠️ App stopped working after updates
Bugs and requests
Calculator +
Reported bugs
5 issues- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes
Requested features
5 requests- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines
Trig Solver
Reported bugs
12 issues- Calculator rounds to '7' and '0'
- Regular triangle calculations not correct
- Answers in the wrong place (angles reversed)
- App doesn't work anymore after update
- Can't see input in dark mode
Show 7 moreShow fewer
- Base hidden behind buttons on older phones
- Fails with small machining angles (gives 90 degrees)
- Wrong values under 'regular triangle'
- Returned wrong values for side angle side
- Incorrect values on irregular triangle
- Paid to remove ads but ads still present
- NaN results
Requested features
8 requests- Rotate the triangle
- Show the work/steps
- Add square root functionality
- Option to pay to remove ads
- Modify single value without reset
Show 3 moreShow fewer
- Graph resultant triangle
- Show more decimal places (3, 4, or 5)
- Add comma as decimal separator option
In-app purchases
Calculator +
- Scientific Calculator3 Days trial$4.991 Month
- Calculator7 Days trial$39.991 Year
- Linear Calculator$2.99
- Factoring Calculator$2.99
- Handwriting Calculator$2.99
Show 5 moreShow fewer
- Graphing Calculator$3.99
- Fraction Calculator$3.99
- Scientific Calculator$4.99
- Calculator Plus$4.99
- Calculator$16.99
Trig Solver
No in-app purchases
Questions
Is Calculator + free?
Is Trig Solver free?
Which has better reviews, Calculator + or Trig Solver?
Do Calculator + or Trig Solver have ads?
Which is updated more often, Calculator + or Trig Solver?
Other comparisons
