Apps Like SPK-ToolBox for iPhone and iPad
Ranked alternatives
Showing 121–140 of 1,000 ranked alternatives.



PocketChem
Ajay Gandecha
Browse periodic table elements and search
Browse the periodic table in light and dark modes. Search elements by name or view them in list format.

BCalc - a daily calculator
煦 张
Record, modify, and recalculate easily.
The app records every calculation step, allowing users to modify any step and recalculate without re-entering data. It functions like a printing calculator with a paper tape history for clarity and ease of use.

Truth Table Builder
Ketan Appa
Build truth tables from Boolean formulas.
The app builds truth tables from Boolean formulas. It supports up to 8 variables and shows sub-expressions, preserving the original truth function.

Amount Plus - Unit Converter
Marco Torretta
Convert units, calculate values, organize tasks
Convert units quickly with over 700 options across 30 categories. Customize conversion settings and layouts. Add notes and formulas for calculations. Export results in various formats. Share converted values directly.


Mechanical Engineering Toolkit
APPS BAY LIMITED
Calculate formulas instantly
Allows users to calculate equations and formulas. Input variables to solve for unknowns in mechanics of materials. Access force-displacement relations and moment calculations. Retrieve reference materials for formulas.




Converter of Units
Ramon Rivas
Convert with precision and speed
Convert across categories with a modern interface. Navigate using sidebar and tab bar. Create multiple windows and drag items to new screens. Share data and access context menus. Includes a quick start guide and light/dark modes.

Universal Converter.
V PUGAZHENTHI
Convert units across 64 categories
Convert units across 64 categories with 1333 units and 53742 conversions. Switch between acceleration, angle, area, and other measurements. Find color codes and convert cooking measurements.


Unit Ease - Metric vs Imperial
Cheng Cheng
Convert units and track conversions
Convert units for weight, length, temperature, volume, area, speed, and time. Access size charts for clothing and accessories. Perform everyday conversions like cooking measurements and tyre pressure.




Earthquake Alert - Seismic
婷 张
Monitor earthquakes and track real-time data
Monitor earthquakes with real-time updates and GPS compass maps. Display professional data including altitude, orientation, air pressure, and coordinates. View environmental metrics like humidity and temperature.

Probability-Distributions
Matthew Bognar
Calculate probabilities, plot distributions, and find percentiles
Calculate probabilities and percentiles for normal, t, chi-square, F, exponential, gamma, beta, log-normal, Pareto, and Weibull distributions. Plot density functions for these distributions.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.