Comparison

Calcularium vs aLock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calcularium

This app offers real-time calculations, allowing you to see results as you type. It goes beyond basic arithmetic with advanced functions, unit conversions, and customizable expressions, acting as a powerful helper for complex calculations.

Highlights
  • Reactive Calculations
  • Voice Control (Siri)
  • Script and Photo Input
  • Multi-Level Sub-Calculations
  • Editable History
  • Unit and Currency Conversion
  • Customizable Functions
Features
Read full description

Here are Calcularium users describing the app: "You know how you're slowly calculating something and you're in the middle of an expression so you want to know how you're doing? Yeah well that's real time calculation and I couldn't find an app that did it right, tried dozens of them and still nothing, BUT this app does it the perfect way, actually the way it should work, this app is definitely worth it, thanks a lot devs, big love. Edit: OMG this is better than I thought, I just noticed the tutorials given and this app has more functions than I noticed, this is super amazing, devs, you're the best." – Anton31kah10 "I mean it literally. The tiny app packs impressive amount of useful stuff for a mere calculator. I would say it’s like mobile Excel. Math functions, unit conversion, currency exchange rates, and, even simple programmers functions. I wrote a small formula to calculate tips for our county. Easier and better than any tipping app! I hope the developer expands these functions for Shortcuts and Siri. This would be real killer app! Thanks guys!" – Z!KeepeR "What looks like just a clean calculator app is in fact a powerhouse full of advanced features you could only get with custom Excel mega sheet." – AlexDbk "You can find a lot of different kind of calculators but this is something completely new and awesome. It is not an another boring calculator. This is your real helper if you need to calculate something more than 2+2 :). Tutorial is great and helpful. History, customizable functions, variables, converter and much more. Great! It is definitely the next generation of the regular things." – Lysyk CALCULARIUM FEATURES: • Voice-controlled, backed by Siri • Script and Photo input modes • Reactive Calculations • Multi-Level Sub-Calculations with No Limits • History: Editable and Reusable • Self-Explanatory Naming for Every Component • Functions and Reusable Expressions • Constants and Reusable Numbers • Multiple Reversible Conversions (350+ units and 160+ currencies) • Advanced Search • Built-In Scientific Functions CONTROL BY VOICE Calcularium is also can be controlled by voice and has the ability to understand spoken math questions and calculate the answer. Tell it: "6 bottles by 15 dollars” - and it will give you the right result! It works by using verbal numbers and mathematical operations. FLUID DESIGN The design language of the Calcularium is based on tokens. All tokens are of the same structure: the left part shows a type of the element, the right part has a result or an entered value and its name on top. In addition to tokens there are pure numbers and math operators. HISTORY You can set an expression as a variable with the goal to use it afterwards in other expressions and give every component a clear name to recall what it stands for easily. Create a calculation, and next time you reuse it from History section, every component will clearly speak to you. Almighty Version is a recurrent subscription with such options: 1 month, 6 month and 1 year. Confirmation of purchase is required to start free one week trial period. The subscription begins immediately. Payment will be charged to iTunes Account at the end of the trial period. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current 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. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy Policy https://www.invoodoo.com/privacy-policy Terms of Use https://www.invoodoo.com/terms-of-use

About

aLock

Manage your screen time effectively by setting usage limits for apps and automatically restricting them when limits are reached. This app helps users, including children, focus better by blocking distractions and inappropriate content. A free trial is available for premium features.

Highlights
  • Set app usage limits
  • Automatic app restriction
  • Manual app restriction/restoration
  • Focus enhancement for children
  • Distraction blocking
  • Free trial for premium features
Features
Read full description

It is a very useful screen time management app that allows you to set usage limits for apps and automatically restrict apps when the limit is reached. Additionally, you can manually restrict or restore applications as needed. - Use of social media and games can be limited to help children focus better and block inappropriate content. - A time limit for the app can be set to help you not get distracted by the app. Start a free trial to access all premium features - You can subscribe for unlimited access to all premium features - Within 24 hours before the end of the free trial period, the change fee calculated according to the subscription plan will be automatically debited from your account - You can cancel the auto-renewal at any time, if the cancellation occurs at least 24 hours before the end of the current period Support: tinfineapp@outlook.com Privacy Policy: https://decisive-store-bd5.notion.site/Privacy-Policy-3930ce2f70bf41df93666e029f0a1d19 Terms of Use: https://decisive-store-bd5.notion.site/Terms-Conditions-7dcac12bf71f41edbee0e260df02c563

Screenshots

Calcularium4 screens
aLock4 screens

Verdict

The call

The clearest difference is ads: aLock at none against Calcularium's shown. aLock also leads on iOS requirement (16.0 vs 18.0). Calcularium's advantage is ratings volume (2.2K vs 32). On price, rating, review sentiment and update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calcularium sells 7 in-app purchases, starting at $3.99 per month and aLock sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Calcularium against 4.7 for aLock. That said, the two scores are not equally well evidenced: Calcularium has 2.2K ratings behind it against 32, so its average is the more settled of the two. Written reviews are what separate them: 67% of Calcularium's written reviews are positive against 75% of aLock's.

UpkeepUpdate frequency

Calcularium ships an update fortnightly, aLock every 3 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Calcularium versus aLock: the parameters behind the verdict, then further details
ParameterCalculariumaLock
PriceFreeFree
Rating4.6 (2.2K ratings)4.7 (32 ratings) — better
Positive reviews67.3% of reviews75.0% of reviews — better
Number of ratings2.2K — better32
Update frequencyFortnightly — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size52 MB7 MB
Age rating4+4+
DeveloperInVooDoo LLC裕涛 兰

Customer experience

Calcularium

All ratings2,174 ratings
Positive89.7%
Neutral3.3%
Negative7.1%
Written reviews49 reviews
Positive67.3%
Neutral6.1%
Negative26.5%

aLock

All ratings31 ratings
Positive90.3%
Neutral3.2%
Negative6.5%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Bugs and requests

Calcularium

Reported bugs

3 issues
  • Crashes or freezes on certain devices
  • Incompatibility with older iOS versions
  • Issues with calculator widget functionality

Requested features

4 requests
  • Add basic calculator functions like equal and clear buttons
  • Improve unit conversion and scientific functions
  • Integrate with Shortcuts and Siri
  • Provide more customization options

aLock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Calcularium

Subscriptions4
  • Almighty Version$3.991 Month
  • Almighty Version$4.996 Months
  • InVooDoo One$5.991 Month
Show 1 more
  • Almighty Version$29.991 Year
One-time3
  • Unlock Pro Version$199.99
  • Lifetime Almighty Version$199.99
  • Remove Ads Only$199.99
3 purchases

aLock

Subscriptions2
  • App Lock for 1 week3 Days trial$2.997 Days
  • App Lock for 1 year3 Days trial$9.991 Year
One-time1
  • App Lock Premium$19.99

Questions

Is Calcularium free?
Calcularium is free to download, with in-app purchases available.
Is aLock free?
aLock is free to download, with in-app purchases available.
Which has better reviews, Calcularium or aLock?
aLock is rated higher. Calcularium averages 4.6 out of 5 from 2.2K ratings, while aLock averages 4.7 from 32 ratings.
Do Calcularium or aLock have ads?
Calcularium shows ads; aLock does not.
Which is updated more often, Calcularium or aLock?
Calcularium ships an update fortnightly, and aLock every 3 weeks. Most recently, Calcularium was updated on October 22, 2026 and aLock on October 24, 2026.

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