# Delta Calc vs SimpleFrames

The clearest difference is price: SimpleFrames at Free against Delta Calc's $0.99. SimpleFrames also leads on iOS requirement (15.6 vs 17.6). Delta Calc's advantage is update cadence (every 3 days vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

SimpleFrames is free to download; Delta Calc costs $0.99 up front. Delta Calc sells 3 in-app purchases, starting at $0.99 per month and SimpleFrames sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Delta Calc ships an update every 3 days, SimpleFrames every 2 months. The most recent releases landed on June 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Delta Calc | SimpleFrames |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/delta-calc/id6504148868/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | Paid | — |
| Size | 2 MB | 3 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Stephen Coffey](https://appshunter.io/developer/1723308273) | [越 张](https://appshunter.io/developer/1810698182) |

## What reviewers say

### 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 |


### SimpleFrames

[App page](https://appshunter.io/ios/app/simpleframes/id6745803868)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 简单抽帧周会员 | $0.99 | per 7 days |
| 简单抽帧月会员 | $2.99 | per month |
| 简单抽帧年会员 | $17.99 | per year |
| 简单抽帧买断 | $29.99 | one-time |


## Frequently asked questions

### Is Delta Calc free?

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

### Is SimpleFrames free?

SimpleFrames is free to download, with in-app purchases available.

### Do Delta Calc or SimpleFrames have ads?

Neither Delta Calc nor SimpleFrames shows ads.

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

Delta Calc ships an update every 3 days, and SimpleFrames every 2 months. Most recently, Delta Calc was updated on June 1, 2026 and SimpleFrames on September 19, 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.*