Soulver 4

Soulver 4

Notepad, meet calculator.

437 ratings
246 reviews
Free
In-App Purchases

Details

Released
May 3, 2020
Updated
October 30, 2026

Features

Soulver 4 screenshot #1 for iPhone
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Soulver 4 screenshot #8 for iPhone
iphone
iphoneDuo
ipad
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About

This app combines the functionality of a notepad with a powerful calculator. It allows users to perform complex calculations using natural language, supports unit conversions, date math, and live currency conversions. Organize your calculations in sheets with text comments and share them as PDFs.

✓Natural language calculations
✓Unit and currency conversions
✓Date and time math
✓Live currency and stock prices
✓Customizable accessory keyboards
✓Spreadsheet-like line references
✓Variables and conditional statements
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What users say about Soulver 4

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What's New in Soulver 4

4.0.5

October 30, 2026

GENERAL IPHONE DUO – Soulver is made for iPhone Duo – Designed a special number keyboard for Duo in the unfolded pose, with additional accessory keys on the left side and the number pad on the right side – The keyboard automatically splits when in the partially open pose – The answer column automatically aligns along the crease in the partially open pose EXPORT & SHARING – Print, PDF and Email always go through the styling options first, including ⌘P from a keyboard – Improved the layout of the styling options preview EXTERNAL DOCUMENTS (.SLVR FILES) – The title menu now lets you import the file to the open sheetbook, copy the text with answers, and customise PDF, print & email export BUG FIXES – Fixed an issue where the close button was hidden when editing external documents on iOS 26 (thanks David on Mastodon) – Fixed an issue where pushing changes to iCloud could be delayed after making an edit and immediately going to the Home Screen, until reopening the app. The sync now happens in the background even when Soulver is dismissed (thanks Michael) – Fixed an issue where line numbers could be misaligned when using quite large accessibility text sizes CALCULATOR GROWTH & CHANGE – Added a phrase to calculate the time required to reach a multiple or double/triple: time to 2x at 7% → 10.24 years, time to double at 12% → 6.12 years – Support for a growth over a period phrase: years from $100 to $200 at 7% growth every year → 10.24 years DATES & TIMES – Durations in the form “xh:xm” are now supported: 1h:17m → 1 hour 17 min, 1h:17:30 → 1 hour 17 min 30 s, 1:17s → 1 min 17 s – Support for “my time” and “local time” meaning your current device time zone: 4pm EST in local time UNITS – Added the long tons unit: 3 long tons in kg → 3,048.14 kg (thanks Sergiy)

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Subscriptions & In-App Purchases

AI Assistant, Stocks & Weather

Wolfram|Alpha & advanced stock & weather data

$26.001 Year
Price Updates
November 3, 2026→$26.00
October 2, 2025→$30.00
April 15, 2025→$26.00
How to cancel Soulver 4 subscription ⁉️

User reviews

Outstanding App with Exceptional Customer Support!

I absolutely love Soulver 4! It’s incredibly easy to use, versatile, and has become an essential tool for my everyday calculations. The app works great, and I especially appreciate how seamlessly everything syncs across my devices. What really sets Soulver apart, though, is its outstanding customer support. They were quick to respond, extremely helpful, and made sure my issue was resolved and everything was syncing properly. It’s refreshing to see a company that not only makes such a great product but also genuinely cares about its customers. I highly recommend Soulver 4 to anyone looking for a powerful, easy-to-use calculation app backed by exceptional customer service!
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Flexible worksheet

Work in intuitive, plain text: many functions, unit conversions, plan timing of multi-step events, and a useful menu bar icon to pull up a quick calculation widget. A little bit of everything and easy to use. Soulver is constantly open.

Another reviewer mentions that Soulver doesn’t handle units as it used to. For fancy physics-style work, the open source “qalc” might be better. It can do algebraic integration and differentiation and has more units than you’ve ever heard of. BUT that causes it to not be nearly as useful as Soulver for something like “($150K + $245K) x 12”, where Soulver understands the “K” to mean thousands, not “Kelvin”. You have to say “200 K to F” for Soulver to interpret it as Kelvin. Intuitive. Smart. Soulver is great that way.
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Bonne app mais Claude la recrée gratuitement

Demandez à l’IA Claude de vous créer un artéfact en ligne copiant le principe de l’app et vous l’aurez gratuitement + personnalisée (français). Dommage de payer 60€ quand on peut l’avoir pour 0.

Response from developer

AI can make a superficial copy of anything. Carefully designed things cost money and average things are often free. Soulver is my original idea that I’ve been improving for over 20 years. There’s a lot of experience and craft that go into building this product, and so many refinements for each supported platform. The calculation engine itself is over 50k lines of code. Leaving a negative review despite recognising that the idea and implementation is good seems uncharitable. Are you fundamentally opposed to rewarding software craft & invention? Do you not believe in supporting indie developers financially to feed their families when they build a useful product?

Comprehensive ability with Excellent Support

I purchased this App for it’s ability to load Stock, ETF and MF symbol data and it does a very good job. I’m also using for currency updates and it does an amazing job. Easy to design formulas for just about anything. eMail support is prompt and all questions I asked were answered. I highly recommend this App
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One of four apps that keep me on Mac

Soulver allows you to create a narrative with numbers. It is fantastic for explaining or exploring ideas real-time. I’ve been using it since 2007, and am always delighted at the thoughtful design, and it’s one of 4 programs that keep me on Mac (Devonthink, Tinderbox, Things3, and Soulver).

Thank you for such a great app. It’s truly among the best.
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User experience

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Reported Bugs

3 issues

Crashes when using certain emojis in sheet titles

Bug

Issues with iCloud sync and data migration from older versions

Bug

Inconsistent behavior when modifying variables and formulas

Bug
✨

Requested Features

4 requests

Improved iPad and iPhone UI/UX

Feature

Enhanced data export and sharing options

Feature

More advanced mathematical and scientific functions

Feature

Ability to define custom units and unit conversions

Feature

FAQ

What does Soulver 3 do?

Soulver 3 is a notepad calculator designed to simplify everyday math problems. It supports natural language functions for calculations, unit conversions, date and time math, and live currency conversions. You can also organize your calculations in sheets with text comments and share them as PDFs.

What are the key features of Soulver 3?

Key features include natural language calculations, over 300 unit conversions, live currency and stock price conversions, date and time math, business day calculations, and customizable accessory keyboards. It also offers spreadsheet-like line references, variables, and conditional statements for advanced workflows.

How much does Soulver 3 cost?

Soulver 3 is a one-time purchase and is not a subscription. This is the first paid version for iPad and iPhone since the original release in 2009.

Is Soulver 3 compatible with older versions?

Yes, you can import your Soulver 2 files by tapping the '+' button and selecting them from Files. iCloud syncing is also available with Soulver 3 for Mac.

What are some common use cases for Soulver 3?

Common use cases include calculating discounts, converting units for cooking or DIY projects, planning travel with date and time math, managing personal finances with financial functions, and working with video time codes. The natural language input makes it easy to handle a wide range of everyday calculations.