LIMSTAR vs CalcKey
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LIMSTAR
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.
- Space-themed gamification
- Earn app time through walking
- Meditate to gain focus
- Explore nature for rewards
- Self-discipline tool
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LIMSTAR is a space-themed self-discipline tool. Walk, meditate, and explore nature to earn app usage time. Begin your starship journey now.
CalcKey
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.
- Keyboard calculator extension
- Real-time results
- Basic & scientific calculators
- Calculation history
- Smart formatting
- Standalone app option
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CalcKey – Smart Calculator Keyboard Calculate Instantly. Anywhere. Anytime. No more switching between apps just to do quick math! With CalcKey, you get a powerful calculator app and an intelligent keyboard extension — so you can calculate right inside Messages, Notes, Mail, or any app without ever leaving your screen. Key Features: - Keyboard Calculator Extension – Instantly calculate while chatting or typing. Works in Messages, WhatsApp, Notes, and more! - Real-Time Results – Get instant answers as you type. - Basic & Scientific Calculators – From quick sums to advanced equations, CalcKey does it all. - Calculation History – View, copy, or reuse past results easily. - Haptic Feedback – Enjoy subtle vibrations for a smooth typing experience. - Smart Formatting – Supports decimals, thousands separators, and clear result display. - Works Everywhere – Use it as a standalone app or directly from your keyboard. Perfect for messaging apps! Reply, calculate, and chat — all without leaving the conversation. CalcKey makes multitasking effortless. Subscription Pricing, Policy & Terms: - Monthly Plan - $3.99/per month - LifeTime Access - $19.99/One time charge - Subscription automatically renews unless auto-renew is turned off at least 24 - hours before the end of the current period. - Payment will be charged to iTunes Account at confirmation of purchase. - Account will be charged for renewal within 24-hours prior to the end of the current period. - No cancellation of the current subscription is allowed during the active subscription period. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. - Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Terms & Condition: https://www.righttracksit.com/calckey/terms Privacy Policy: https://www.righttracksit.com/calckey/privacy-policy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | LIMSTAR | CalcKey |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.9 (9 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 2 | 9 — better |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15 — better |
| Further details — not scored | ||
| Size | 20 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | 羽 唐 | Right Tracks IT Limited |
In-app purchases
LIMSTAR
- LIMSATR Life Member$0.99
CalcKey
- CalcKey Pro Monthly3 Days trial$3.991 Month
- One time purchase$19.99
