# LIMSTAR vs CalcKey

The clearest difference is rating: LIMSTAR at 5.0 against CalcKey's 3.9. LIMSTAR also leads on update cadence (weekly vs every 3 weeks). CalcKey's advantage is ratings volume (9 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. LIMSTAR sells 1 one-off in-app purchase and CalcKey sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

LIMSTAR holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 2 and 9 respectively.

LIMSTAR ships an update weekly, CalcKey every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | LIMSTAR | CalcKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/limstar/id6745580960/reviews)** | [3.9 (9 ratings)](https://appshunter.io/ios/app/calckey-calculator-keyboard/id6748647909/reviews) |
| Number of ratings | 2 | **9** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 20 MB | 14 MB |
| Requires iOS | 16.0 | **15** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [羽 唐](https://appshunter.io/developer/1734231509) | [Right Tracks IT Limited](https://appshunter.io/developer/1803615116) |

## What reviewers say

### LIMSTAR

[App page](https://appshunter.io/ios/app/limstar/id6745580960)

This space-themed productivity tool encourages self-discipline through activities like walking and meditation. Earn app usage time by engaging with nature and completing tasks, all while embarking on a cosmic journey.

**Highlights:** Space-themed gamification, Earn app time through walking, Meditate to gain focus, Explore nature for rewards, Self-discipline tool

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LIMSATR Life Member | $0.99 | one-time |


### CalcKey

[App page](https://appshunter.io/ios/app/calckey-calculator-keyboard/id6748647909)

Perform calculations directly within any app using a smart keyboard extension. Get instant results for basic and scientific equations, with a history of your calculations. Enjoy a seamless typing experience and smart formatting.

**Highlights:** Keyboard calculator extension, Real-time results, Basic & scientific calculators, Calculation history, Smart formatting, Standalone app option

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalcKey Pro Monthly | $3.99 | per month |
| One time purchase | $19.99 | one-time |


## Frequently asked questions

### Is LIMSTAR free?

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

### Is CalcKey free?

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

### Which has better reviews, LIMSTAR or CalcKey?

LIMSTAR is rated higher. LIMSTAR averages 5.0 out of 5 from 2 ratings, while CalcKey averages 3.9 from 9 ratings.

### Do LIMSTAR or CalcKey have ads?

Neither LIMSTAR nor CalcKey shows ads.

### Which is updated more often, LIMSTAR or CalcKey?

LIMSTAR ships an update weekly, and CalcKey every 3 weeks. Most recently, LIMSTAR was updated on October 25, 2026 and CalcKey on October 24, 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.*