# Delta Calc — A fast percent change calc

> Fast and fun percent change calculator for discounts and financial gains. (iPhone/iPad app by Stephen Coffey.)

- Source: https://appshunter.io/ios/app/delta-calc/id6504148868 (this page in markdown: same URL + `.md`)
- Developer: [Stephen Coffey](https://appshunter.io/developer/1723308273)
- Category: Utilities, Finance
- Price: $0.99 with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 17.6 · 2 MB
- Languages: American English
- Released: 2024-06-09
- Data updated: 2026-06-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/delta-calc/id6504148868/reviews.md

## What is Delta Calc?

A fast, easy, and fun-to-use percent change calculator. Now you can quickly calculate discounts, financial gains, and percent changes without having to use Excel, Google, or do the long math.

Delta Calc can solve for any of the three values within the percent change formula. It solves for the a, b, or c value in the percent change formula ((b - a) / a) * 100 = c. 

Other features include:
- Haptic feedback (can be disabled if desired)
- Change the number of decimal places displayed in the result (from 0 to 10)
- Fun animation when tapping the swap button (warning: could become addictive)
- Delightful to tap number pad buttons
- Enable and disable keyboard buttons

Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy: https://deltacalc.app/privacy
Support: https://deltacalc.app/support

## Key features

- Calculate percent changes
- Solve for any variable in the formula
- Customizable decimal places
- Haptic feedback
- Fun animations
- Adjustable keyboard buttons

## Pricing and in-app purchases

Base price: $0.99.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Delta Calc Monthly | $0.99 | per month |
| Delta Calc Yearly | $4.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Delta Calc Lifetime | $9.99 | one-time |



## Frequently asked questions about Delta Calc

### What is Delta Calc?

Delta Calc is a utility app designed for fast and easy calculation of percent changes, discounts, and financial gains. It allows users to solve for any of the three values within the standard percent change formula.

### How much does Delta Calc cost?

Delta Calc is a paid app priced at $0.99. It also offers optional subscription plans: Delta Calc Monthly for $0.99 and Delta Calc Yearly for $4.99.

### Does Delta Calc have ads?

No, Delta Calc does not contain advertisements. It is a paid application that offers a clean, ad-free user experience.

### What devices does Delta Calc support?

Delta Calc is available for iPhone and iPad devices. It was last updated on October 23, 2025, with version 1.12.

### What is the age rating for Delta Calc?

Delta Calc has an age rating of 4+. This indicates it is suitable for children and adults, with no mature content.

### Can I customize the number of decimal places in Delta Calc?

Yes, Delta Calc allows you to change the number of decimal places displayed in the result, from 0 up to 10. This feature helps tailor the output to your specific needs.

### What makes Delta Calc fun to use?

Users often enjoy Delta Calc for its haptic feedback, fun animations when tapping the swap button, and delightful number pad button interactions. These elements aim to make calculations more engaging.

### How often is Delta Calc updated?

Delta Calc was released on June 9, 2024, and its latest version, 1.12, was updated on October 23, 2025. This indicates a relatively frequent update schedule for the app.

## Version history (last 5 releases)

### 1.12 — 2025-10-23

This update includes minor improvements and bug fixes.

### 1.11 — 2025-08-29

Introducing Delta Calc's biggest update yet!
- You can now add Delta Calc to your Control Center to quickly open the app.
- Implemented a clockwise animation when swapping two values (warning: could become addictive).
- Updated the layout to be more adaptive to iPad screens.
- Enabled haptic feedback for button taps (can be disabled if desired).
- Included a Support link in Settings (this takes you to a form where you can provide feedback and include attachments).
- For new downloads only: implemented a launch screen to subscribe monthly, annually, or make a one-time purchase. Please note that the app is still completely free to use; simply tap the X button in the top right to dismiss the paywall. However, unless subscribed or a one-time purchase has been made, the launch screen will appear every time you open the app.

### 1.10 — 2025-05-21

Minor bug fixes and enhancements.

### 1.9 — 2024-07-21

- Added a settings page.
    - You can change the number of decimal places from 0 to 10.
    - You can enable or disable the Plus Minus button, Swap button, and the Navigate button.
- Other minor updates and enhancements.

### 1.8 — 2024-06-27

Here’s what’s new in version 1.8 of Delta Calc:
- Minor enhancements

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## More apps by Stephen Coffey

- [1% Habit](https://appshunter.io/ios/app/1-habit/id6475082704)

All apps by Stephen Coffey: https://appshunter.io/developer/1723308273

## Related topics

[percent change](https://appshunter.io/ios/topics/percent-change) · [percent change calculator](https://appshunter.io/ios/topics/percent-change-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*