# Calculate84 Plus vs Locked In

The clearest difference is monetization model: Locked In at free against Calculate84 Plus's free with in-app purchases. Locked In also leads on update cadence (every 2 weeks vs every 2 months). Calculate84 Plus's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calculate84 Plus sells 10 in-app purchases, starting at $2.99 per month and Locked In sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Calculate84 Plus ships an update every 2 months, Locked In every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Calculate84 Plus | Locked In |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (306 ratings)](https://appshunter.io/ios/app/calculate84-plus/id1472933065/reviews)** | — |
| Number of ratings | **306** | — |
| Positive reviews | 64.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 33 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Di Venisco UG (haftungsbeschrankt)](https://appshunter.io/developer/1449451480) | [OMAR DANIEL GRAZIANO](https://appshunter.io/developer/1896485759) |

## What reviewers say

### Calculate84 Plus

[App page](https://appshunter.io/ios/app/calculate84-plus/id1472933065)

This app provides advanced scientific and graphing calculator functionality. It allows users to plot multiple functions, perform complex mathematical operations, analyze data with statistics, and manage matrices. An optional subscription unlocks even more features.

**Highlights:** Natural textbook equation input, Plot multiple functions with touch controls, Advanced math, number, and probability functions, 1- and 2- Variable statistics, Matrix arithmetic and equation solving, Extensive command catalog

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HyperCalc - Monthly | $2.99 | per month |
| HyperCalc - Monthly | $2.99 | per month |
| HyperCalc - Monthly | $4.99 | per month |
| HyperCalc - Monthly | $4.99 | per month |
| HyperCalc - Yearly | $14.99 | per year |
| HyperCalc - Yearly | $14.99 | per year |
| HyperCalc - Yearly | $19.99 | per year |
| HyperCalc - Yearly | $19.99 | per year |
| HyperCalc - Lifetime | $29.99 | one-time |
| HyperCalc - Lifetime | $39.99 | one-time |

**What reviewers like**

- 👍 Similar to TI-84
- 👍 Good for stats
- 👍 Accurate calculations
- 👍 No ads
- 👍 Fresh design

**What reviewers complain about**

- 💰 Many features require payment
- 💰 Not free as advertised
- 💰 Subscription model disliked
- 💰 Lifetime purchase issues
- 💰 Expensive ($30)

**Reported bugs**

- Domain incorrect in y= table
- App closes when pulling up table
- Cannot input negative matrices
- App freezes during IAP search
- Cannot drag functions

**Requested features**

- Dark mode
- Numeric solver (free)
- 2nd function
- Chinese language support
- Tutorial videos


### Locked In

[App page](https://appshunter.io/ios/app/locked-in-prep-for-cysa-plus/id6770587466)

This study companion breaks down cybersecurity exam material into short, focused lessons with quick checks. It includes practice questions, mock exams, flashcards, and a searchable glossary to aid learning. Progress tracking and offline functionality are also available.

**Highlights:** Bite-sized lessons for CS0-003 exam domains, Visual diagrams for key concepts, Inline quick-checks and practice questions, Performance-based question simulations, Timed mock exams, Spaced repetition flashcards, Searchable glossary and progress tracking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Locked-In Full Unlock | $9.99 | one-time |


## Frequently asked questions

### Is Calculate84 Plus free?

Calculate84 Plus is free to download, with in-app purchases available.

### Is Locked In free?

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

### Do Calculate84 Plus or Locked In have ads?

Neither Calculate84 Plus nor Locked In shows ads.

### Which is updated more often, Calculate84 Plus or Locked In?

Calculate84 Plus ships an update every 2 months, and Locked In every 2 weeks. Most recently, Calculate84 Plus was updated on November 3, 2026 and Locked In on October 31, 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.*