Calculations are for computers, but Soulver makes them human again. The revised version 3 app lets you enter readable and formatted arithmetic metrics, features, dates, and device conversions, and get results you can use.
It is especially useful if you are constantly working among combinations of devices, such as throughput over time (Mbps per hour), or often return to the same metrics that you connect to different values.
Soulver is not a calculator as such, even though it tackles any math you write on it, no matter how long the operating set. (If you want a calculator, try PCalc.) Rather, it is a way to work comfortably in a math and device environment to calculate problems that are often needed in daily life.
You can use variables to create different scenarios with the same number, track sales and commissions, or calculate complicated volume numbers without having to build a spreadsheet. Text formatting options and comments let you keep everything readable and self-documented.
For example, instead of figuring out the calculator approximation to a percentage, you can often require a specific sequence to hit the% button, enter into Soulver,
20% of $ 1 and become immediately presented for
$ 0.61 .
And I don't know about you, but when I use a recipe for imperial measurements, make sure I get teaspoons, tablespoons and cups right when I double or halve? I'd rather write
8 pp in cups in Soulver and find out the answer (half a cup). If you need custom devices, you can also add them.
Soulver divides vertically: calculations and statements are displayed on the left and results on the right. You can enter a wide variety of maths and conversions, which include simple calculations with parentheses and the order of priority, which you may remember from math classes:
(2.5 + 7.5) * 1.11 / 10 - 15 ^ 2 . (It is
-223.89 by the way.)
The revised version also offers several ways to get results by entering something similar to regular speech while still being consistent with a structure, so you can hunting for an answer through contexts of existing numbers.
A unique slider over slider allows you to "scrub" through numbers to see results, so you can quickly run through many options without typing. Although not recommended for political decision-making, it can be helpful when adjusting the sizes of a hanging wall or how many miles a day to drive for a walk.
New in version 3 are two features that require close adherence to syntax than most others in the app. A "rule of three" feature where Soulver can fill in the form. This is good for proportions. You specify one of these in the form "number is to number as numbers are to what," which in
9 is to 16 which 27 is to what (answer: 48).
With dates, you cannot enter arbitrary calculations, as Soulver relies on an Apple math library for dates. But you can find many results that would otherwise involve manually counting days or weeks on a calculator.
June 1, 2019 - 6 weeks gives you, for example, April 20.
A common problem for us transmitting large files over networks and the internet is getting a decent estimate of how long it will take to copy these items or the capacity of my throughput. I regularly approach Soulver for this as it accepts calculations such as:
120 Mb / second × 100 hours in TB(5.4TB)
1 TB / (120 Mb / second) in hours(18.5 hours)
Capitalization is still important in units here as in others: one megabyte (one million bytes) is capital M and B (MB), while megabit (one million bits) is capital M and lowercase (Mb). While this long-standing similarity can be a problem in other worlds, it is easy to get rid of a factor of eight here.
Soulver shows many numbers by the decimal for results that do not divide or multiply nicely, called precision. The default setting is 10 digits, which is useful for certain types of mathematical results and scientific calculations, but too much for daily use. You can hover your mouse pointer over a result, clicking on the Round icon (≈), which allows you to adjust to the degree of precision you need.
The latest version lets you gather Soulver files into some kind of notebook, so you can move between them through a sidebar and organize them too. It also makes it easier to find projects you have been working on.
The revision is not without a shock to previous users, such as this reviewer, as Soulvers developer replaced the underlying third-party feed engine with a superior one that is still a work in progress for some remote features, such as data units. However, my concerns were answered through micro-releases in version 3.0 and an important 3.1 release.
A few features are still absent. The precision adjustment above can be set by default for all new calculations in Soulver 2 and then overridden where desired; The developer said it is scheduled for a future release of version 3. Line numbering is also missing, but planned for future additions.
For free-form calculations, in particular unit conversion and currency calculations, Soulver provides answers with little effort and great flexibility.