# LTSD vs Calculator

The clearest difference is in-app purchases: LTSD at none against Calculator's 1. LTSD also leads on ads (none vs shown). Calculator's advantage is update cadence (daily vs every 10 days) and iOS requirement (12.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. Calculator sells 1 one-off in-app purchase. LTSD asks for nothing beyond the download.

LTSD ships an update every 10 days, Calculator daily. The most recent releases landed on October 4, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | LTSD | Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calculator-visual-math/id6747378943/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Daily** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 140 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Lichi](https://appshunter.io/developer/1733179513) | [Vladislav Alikov](https://appshunter.io/developer/1603123547) |

## What reviewers say

### LTSD

[App page](https://appshunter.io/ios/app/ltsd/id6745820548)

**In-app purchases:** none


### Calculator

[App page](https://appshunter.io/ios/app/calculator-visual-math/id6747378943)

This app transforms complex mathematical formulas into interactive computational graphs, allowing users to visualize and understand the logic behind calculations. It offers both scientific and boolean logic modes, with real-time editing capabilities for "what-if" analysis.

**Highlights:** Visualize math as node-based graphs, Interactive graph editing, Scientific calculator mode, Boolean logic solver, Save and load expressions, Customizable themes

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the App and remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is LTSD free?

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

### Is Calculator free?

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

### Do LTSD or Calculator have ads?

Calculator shows ads; LTSD does not.

### Which is updated more often, LTSD or Calculator?

LTSD ships an update every 10 days, and Calculator daily. Most recently, LTSD was updated on October 4, 2026 and Calculator on September 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.*