# Delta Overlap vs Delta Calc

The clearest difference is price: Delta Overlap at Free against Delta Calc's $0.99. Delta Overlap also leads on in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.6). Delta Calc's advantage is update cadence (every 3 days vs every 2 months). On ads and device support there is nothing between them.

Delta Overlap is free to download; Delta Calc costs $0.99 up front. Delta Calc sells 3 in-app purchases, starting at $0.99 per month. Delta Overlap asks for nothing beyond the download.

Delta Overlap ships an update every 2 months, Delta Calc every 3 days. The most recent releases landed on September 15, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Delta Overlap | Delta Calc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/delta-calc/id6504148868/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | — | Paid |
| Size | 3 MB | 2 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gread Elettronica srl](https://appshunter.io/developer/671539111) | [Stephen Coffey](https://appshunter.io/developer/1723308273) |

## What reviewers say

### Delta Overlap

[App page](https://appshunter.io/ios/app/delta-overlap/id674399153)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Delta Calc

[App page](https://appshunter.io/ios/app/delta-calc/id6504148868)

Quickly calculate percent changes, discounts, and financial gains without complex math. Solve for any of the three values in the percent change formula with an intuitive interface and fun animations.

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

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Delta Calc Monthly | $0.99 | per month |
| Delta Calc Yearly | $4.99 | per year |
| Delta Calc Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Delta Overlap free?

Delta Overlap is free to download, with no in-app purchases.

### Is Delta Calc free?

Delta Calc costs $0.99, and also offers in-app purchases.

### Do Delta Overlap or Delta Calc have ads?

Neither Delta Overlap nor Delta Calc shows ads.

### Which is updated more often, Delta Overlap or Delta Calc?

Delta Overlap ships an update every 2 months, and Delta Calc every 3 days. Most recently, Delta Overlap was updated on September 15, 2026 and Delta Calc on June 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*