About SFX Calc
SFX-Calc is a free calculator app designed for academic, scientific and engineering purpose. The calculator features: 1. Basic arithmetic calculation: Plus, Minus, Multiply, Divide 2. Calculation with one operand fixed as...
SFX-Calc is a free calculator app designed for academic, scientific and engineering purpose. The calculator features: 1. Basic arithmetic calculation: Plus, Minus, Multiply, Divide 2. Calculation with one operand fixed as constant 3. Calculation with an non-volatile memory storage 4. Calculation with 10 volatile memory storage 5. Fraction and percentage calculation 6. Linear regression and Statistic calculation 7. Binary / Octal / Decimal / Hexadecimal calculation 8. Various functions like Trigonometric, Hyperbolic, Logarithm, Exponential, Power, Root, etc. 9. UI/UX similar to Casio scientific calculator 10. Formula calculation including Quadratic formula, Standard Normal Distribution Probability, etc.
Version History Add UI setting to exchange the position of the display panel and the legend 6.6 Jan 19 Add setting to keep mode upon restart the app 6.4 06/22/2025 Fix the issue of value entry after pressing the engineering notation key followed by the negation key 6.3 06/16/2025 Fix the UI layout issue when setting Ads at bottom 6.2 06/15/2025 Fix a display issue in the iPad device when bringing it back from the background or switching back from another app 6.1 05/20/2025 Improve user experience in engineering mode 6.0 02/18/2025 Add engineering mode to input number with SI unit 5.9 01/29/2025 Add an option to display engineering notation with SI prefix 5.8 01/19/2025 Fix minor UI issues of key tracking feature and static button feature 5.7 12/28/2024 Add static button setting 5.6 12/24/2024 1. Resolve integer overflow issues in some 13-digit mode computation 2. Resolve long wait time in factorial computation when the result has reached infinity 5.5 12/22/2024 Resolve app launch issue when placing Ads at the bottom 5.3 07/20/2024 1. Add menu setting to swap Pi key and Equal key position 2. Add alert pop-up showing that the following menu setting will take effect after restart a. Switching between 10-digit and 13-digit display b. Switching between 2-exponent-digit and 3-exponent-digit display c. Swapping Pi key and Equal key position d. Switching between Ads on top and bottom 5.2 07/20/2024 Correct the segment font size of the minus sign in the iPad form factor 5.1 07/15/2024 Optimize GUI when the device is in landscape mode 5.0 07/14/2024 Add Kin and Kout indicators on the display 4.9 02/04/2024 Add ALT indicator on the display 4.8 01/04/2024 Enlarge the segment font on the display 4.7 01/01/2024 Add an option to highlight the operator key for the purpose to track the operation 4.6 08/13/2023 Add Segment font 4.5 04/16/2023 1. Add an option to sort the formula menu by usage 2. Add a formula to calculate the cutoff frequency from the given RC 3. Add a formula to calculate the capacitance from the given current and the instantaneous change in voltage 4.4 01/16/2023 Fix blinking effect in some iOS devices 4.3 06/13/2022 Improve the app stability when the sound option is ON 4.2 06/11/2022 1. Add option to enable 3 exponential digits display 2. Add function to copy and paste over the display 3. Add option to enable blinking feedback 4.1 06/04/2022 1. Add home screen quick action "Copy Last Answer" 2. Add option to enable 13-digit display mode 4.0 05/22/2022
Previous Versions
Here you can find the changelog of SFX Calc since it was posted on our website on 2022-03-15 08:35:13.
The latest version is 6.6 and it was updated on 2026-06-14 13:21:51. See below the changes in each version.
SFX Calc version 6.6
Updated At: 2026-06-14
Changes: Version History Add UI setting to exchange the position of the display panel and the legend 6.6 Jan 19 Add setting to keep mode upon restart the app 6.4 06/22/2025 Fix the issue of value entry after pressing the engineering notation key followed by the negation key 6.3 06/16/2025 Fix the UI layout issue when setting Ads at bottom 6.2 06/15/2025 Fix a display issue in the iPad device when bringing it back from the background or switching back from another app 6.1 05/20/2025 Improve user experience in engineering mode 6.0 02/18/2025 Add engineering mode to input number with SI unit 5.9 01/29/2025 Add an option to display engineering notation with SI prefix 5.8 01/19/2025 Fix minor UI issues of key tracking feature and static button feature 5.7 12/28/2024 Add static button setting 5.6 12/24/2024 1. Resolve integer overflow issues in some 13-digit mode computation
2. Resolve long wait time in factorial computation when the result has reached infinity 5.5 12/22/2024 Resolve app launch issue when placing Ads at the bottom 5.3 07/20/2024 1. Add menu setting to swap Pi key and Equal key position
2. Add alert pop-up showing that the following menu setting will take effect after restart
a. Switching between 10-digit and 13-digit display
b. Switching between 2-exponent-digit and 3-exponent-digit display
c. Swapping Pi key and Equal key position
d. Switching between Ads on top and bottom 5.2 07/20/2024 Correct the segment font size of the minus sign in the iPad form factor 5.1 07/15/2024 Optimize GUI when the device is in landscape mode 5.0 07/14/2024 Add Kin and Kout indicators on the display 4.9 02/04/2024 Add ALT indicator on the display 4.8 01/04/2024 Enlarge the segment font on the display 4.7 01/01/2024 Add an option to highlight the operator key for the purpose to track the operation 4.6 08/13/2023 Add Segment font 4.5 04/16/2023 1. Add an option to sort the formula menu by usage
2. Add a formula to calculate the cutoff frequency from the given RC
3. Add a formula to calculate the capacitance from the given current and the instantaneous change in voltage 4.4 01/16/2023 Fix blinking effect in some iOS devices 4.3 06/13/2022 Improve the app stability when the sound option is ON 4.2 06/11/2022 1. Add option to enable 3 exponential digits display
2. Add function to copy and paste over the display
3. Add option to enable blinking feedback 4.1 06/04/2022 1. Add home screen quick action "Copy Last Answer"
2. Add option to enable 13-digit display mode 4.0 05/22/2022
SFX Calc version 6.6
Updated At: 2026-01-19
Changes: Add UI setting to exchange the position of the display panel and the legend
SFX Calc version -
Updated At: 2025-09-26
SFX Calc version 6.1
Updated At: 2025-05-20
Changes: May 20, 2025
Version 6.1
Fix a display issue in the iPad device when bringing it back from the background or switching back from another app
SFX Calc version 6.0
Updated At: 2025-02-18
Changes: Feb 18, 2025
Version 6.0
Improve user experience in engineering mode
SFX Calc version 5.9
Updated At: 2025-01-29
Changes: Jan 29, 2025
Version 5.9
Add engineering mode to input number with SI unit
SFX Calc version 5.7
Updated At: 2024-12-28
Changes: Dec 28, 2024
Version 5.7
Fix minor UI issues of key tracking feature and static button feature
SFX Calc version 5.6
Updated At: 2024-12-24
Changes: Dec 24, 2024
Version 5.6
Add static button setting
SFX Calc version 5.3
Updated At: 2024-07-20
Changes: Jul 20, 2024
Version 5.3
Resolve app launch issue when placing Ads at the bottom
SFX Calc version 5.1
Updated At: 2024-07-15
Changes: Jul 15, 2024
Version 5.1
Correct the segment font size of the minus sign in the iPad form factor
Disclaimer
Official App Store Link
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