# CalcFast vs SimpleFrames

The clearest difference is in-app purchases: CalcFast at none against SimpleFrames's 4. SimpleFrames's advantage is iOS requirement (15.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SimpleFrames sells 4 in-app purchases, starting at $0.99 per 7 days. CalcFast asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on September 19, 2026.

## The numbers

| Metric | CalcFast | SimpleFrames |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (20 ratings)](https://appshunter.io/ios/app/calcfast/id876781417/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 78.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 6 MB | 3 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hannes Sverrisson](https://appshunter.io/developer/428851947) | [越 张](https://appshunter.io/developer/1810698182) |

## What reviewers say

### CalcFast

[App page](https://appshunter.io/ios/app/calcfast/id876781417)

A fast and elegant calculator for Apple devices that displays your calculation history. It offers a Today Extension for quick access and supports Apple Watch, external keyboards, and VoiceOver.

**Highlights:** Calculation history display, Today Extension for quick calculations, Apple Watch app, Dark/light mode selection, External keyboard support, VoiceOver support

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

**In-app purchases:** none


### 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 CalcFast free?

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

### Is SimpleFrames free?

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

### Do CalcFast or SimpleFrames have ads?

Neither CalcFast nor SimpleFrames shows ads.

### Which is updated more often, CalcFast or SimpleFrames?

CalcFast ships an update every 2 months, and SimpleFrames every 2 months. Most recently, CalcFast was updated on September 19, 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.*