# SciCalc Pro vs Stillkeen

The clearest difference is in-app purchases: SciCalc Pro at none against Stillkeen's 3. Stillkeen's advantage is update cadence (every 4 days vs every 13 months) and ratings volume (3 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Stillkeen sells 3 in-app purchases, starting at $4.99 per month. SciCalc Pro asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SciCalc Pro against 5.0 for Stillkeen. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

SciCalc Pro ships an update every 13 months, Stillkeen every 4 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | SciCalc Pro | Stillkeen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/scicalc-pro/id6751385866/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/stillkeen-brain-training/id6798514857/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 days** |
| Monetization | **Free** | Freemium |
| Size | 12 MB | 88 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nehemiah Pettway](https://appshunter.io/developer/1828681134) | [绪伶 罗](https://appshunter.io/developer/6780311584) |

## What reviewers say

### SciCalc Pro

[App page](https://appshunter.io/ios/app/scicalc-pro/id6751385866)

A precise scientific calculator designed for complex calculations in math, science, statistics, and finance. It offers advanced statistical functions, regression tools, and complex number support with a clean interface and integrated user guide.

**Highlights:** Advanced statistics and probability functions, Built-in regression tools, Complex number calculations, Clear modes and syntax, Calculation history, Searchable in-app user guide

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

**In-app purchases:** none


### Stillkeen

[App page](https://appshunter.io/ios/app/stillkeen-brain-training/id6798514857)

Engage in daily brain-training games designed to enhance focus, memory, and cognitive flexibility. Track your progress with detailed practice records and unlock advanced exercises and custom plans with premium features.

**Highlights:** Daily focus and memory games, Progress tracking and practice records, Variety of cognitive exercises, Customizable plans and guided programs, Home screen widget for quick access, Medals for practice milestones

**Features:** Family Sharing, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stillkeen Premium Monthly | $4.99 | per month |
| Stillkeen Premium Annual | $29.99 | per year |
| Stillkeen Premium Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is SciCalc Pro free?

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

### Is Stillkeen free?

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

### Which has better reviews, SciCalc Pro or Stillkeen?

SciCalc Pro and Stillkeen are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do SciCalc Pro or Stillkeen have ads?

Neither SciCalc Pro nor Stillkeen shows ads.

### Which is updated more often, SciCalc Pro or Stillkeen?

SciCalc Pro ships an update every 13 months, and Stillkeen every 4 days. Most recently, SciCalc Pro was updated on October 30, 2026 and Stillkeen on November 6, 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.*