Soulver 4 vs DelayDrop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Soulver 4
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
Read full descriptionHide full description
Ever reach for a calculator and the back of an envelope to work something out? That's what Soulver is for. It's a natural-language notepad calculator: think through a problem line-by-line, using plain words and numbers. The answers appear alongside each line as you type. Soulver isn't just a calculator app — it's the paper you'd scribble on to figure something out. Except this paper does the numbers for you, so you stay thinking at the level of your problem. 20% of $1,480 | $296 $100 in EUR | €86 240 km in miles | 149 mi $1,200 + 15% tax | $1,380 3 weeks from today | June 21 Because Soulver uses sheets (like Notes), you can explore different ideas: weigh options, change variables and watch everything update. WHAT CAN SOULVER CALCULATE? – Live currency conversions — 190 currencies, including crypto – Percentages in plain language — "20% off $50", "$50 is what % of $200" – Unit conversions — hundreds of units across length, weight, volume, data and more – Dates & time — "days until Christmas", time intervals, clock and video-timecode math – Time-zone conversions — "3pm New York to London" – Sums & averages – Financial functions — compound interest, mortgage repayments, hourly rates It's the closest thing to an on-device universal calculator ever created. DESIGNED FOR IPHONE – A meticulously designed numeric keyboard that makes calculating fast – Six specialised accessory keyboards — for currencies, percentages, dates & times, and variables – Build your own custom keyboard with the buttons you reach for most BEST-IN-CLASS ON IPAD – Multiple windows, Slide Over & Split View — float Soulver alongside Notes or Safari – Full Magic Keyboard support with dozens of keyboard shortcuts – Scribble & Apple Pencil – Find & replace, a line-styling palette and a powerful text editor – Automation with URL schemes & Siri Shortcuts POWER USER FEATURES – Multi-word variables — "total cost = $750" – Inline tokenized references to previous answers – Subtotals, tags & trip planning – Wolfram|Alpha integration – Headings, comments, labels & dividers to structure long sheets – Custom units and global variables in the definition sheet SHARING & SYNC – Sync your sheets with Soulver 4 for Mac via iCloud – Export to PDF & plain text, or send beautiful HTML emails – Share a calculation as an image — just take a screenshot ONE TIME PURCHASE Soulver is a one-time (non-subscription) purchase. We've been refining and improving Soulver since 2005, and major paid updates average once every 7 years. Try it free for 60 days, no commitment, no automatic charge. —————————————————————————————— Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
DelayDrop
Effortlessly send any content from one Apple device to another, even if the receiving device is locked or offline. This tool streamlines sharing links, files, images, and text across your iPhone, iPad, and Mac without interruption.
- Send links, files, images, text from any app
- Works with locked or offline devices
- Cross-device compatibility (iPhone, iPad, Mac)
- No signup or login required
- Private and end-to-end encrypted
- Ad-free and no tracking
Read full descriptionHide full description
Send anything to your other Apple devices with two taps, from any app with a share button. It's like AirDrop, but your other device can be locked, off or elsewhere! For iPhone, iPad and Mac. Stop emailing yourself things (or messaging yourself things, or WhatsApping yourself things, or Slacking yourself things). That's just painful! DelayDrop it in two taps. Don't get up: No need to find and unlock a device just to send something to it. Just DelayDrop it. Later, on the right device: Seen something work-related? Deal with it later when you get to your work Mac. Stay in the flow: Tap, tap, sent – simple. Carry on, with minimal interruption. Make DelayDrop an essential part of your workflow. - Send links, files, images, text... anything you like, from any app with a share button - Unlike AirDrop, the other device can be locked or off, and doesn't need to be nearby – it can be anywhere in the world! - Send from any of your Apple devices to any other: iPhone, iPad or Mac. (Devices must use the same Apple ID.) - No signup or login. We don't ask for any personal information. - Private and secure: we can't see your stuff, and nor can anyone else. End-to-end encrypted. - No ads; no tracking. When would you use DelayDrop? - "I'll look at this when I have a bigger screen" - "I'll want this when I'm at my work Mac" - "I'll read this on the train" - "I'l read this later on my iPad" - "I'll listen to this in the car" - "I'll deal with this when I have a keyboard to type on" - "I want to send this to my other device, but I don't want to get up and unlock it!" DelayDrop is fully functional for 7 days with all the above features. After that, an affordable subscription is required – a single purchase for all your devices – otherwise items can only be opened for five minutes after they are sent. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: DelayDrop at 100% against Soulver 4's 76%. DelayDrop also leads on monetization model (free with in-app purchases vs paid). On price, update cadence, ads and in-app purchases 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. Soulver 4 sells 14 in-app purchases, starting at $26.00 per year and DelayDrop sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Soulver 4 ships an update monthly, DelayDrop every 3 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.
| Parameter | Soulver 4 | DelayDrop |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (429 ratings) — better | — |
| Positive reviews | 76.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 429 — better | — |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 39 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Zac Cohan | Adrian Ross |
Customer experience
Soulver 4
DelayDrop
Bugs and requests
Soulver 4
Reported bugs
3 issues- Crashes when using certain emojis in sheet titles
- Issues with iCloud sync and data migration from older versions
- Inconsistent behavior when modifying variables and formulas
Requested features
4 requests- Improved iPad and iPhone UI/UX
- Enhanced data export and sharing options
- More advanced mathematical and scientific functions
- Ability to define custom units and unit conversions
DelayDrop
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Soulver 4
- AI Assistant, Stocks & Weather$26.001 Year
- Complementary UpgradeFree
- 30-day free trial (for iPhone)Free
- 60-day free trial (for iPad)Free
Show 10 moreShow fewer
- 60-day free trial (for Mac)Free
- Soulver 4 for iPhone (upgrade)$7.49
- Soulver 3 for iPhone$14.00
- Soulver 4 for iPhone$15.00
- Soulver 3 for iPad$20.00
- Soulver 4 (Upgrade from Soulver 3)$29.00
- Soulver 4 (Promotion)$39.00
- Soulver 3 for Mac$39.00
- Soulver 4$54.00
- Soulver 4$59.00
DelayDrop
- DelayDrop Subscription$2.991 Month
- DelayDrop Subscription$7.991 Year









