# AddCalculator vs LockMemo

The clearest difference is update cadence: LockMemo at daily against AddCalculator's every 5 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AddCalculator ships an update every 5 days, LockMemo daily. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | AddCalculator | LockMemo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 5 days | **Daily** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 40 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Minseong Kim](https://appshunter.io/developer/1707019155) | [Yui Sakamoto](https://appshunter.io/developer/1856050474) |

## What reviewers say

### AddCalculator

[App page](https://appshunter.io/ios/app/addcalculator/id6466179281)

This utility automatically sums numbers as you input them, streamlining quick calculations. Create custom buttons for frequently used values and review your calculation history. It offers undo/redo functionality and supports two color themes for a personalized experience.

**Highlights:** Automatic addition on number press, Customizable number buttons, Calculation history log, Undo and redo functionality, Dual color mode support

**Features:** macOS Compatibility

**In-app purchases:** none


### LockMemo

[App page](https://appshunter.io/ios/app/lockmemo-simple/id6770174469)

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

**In-app purchases:** none


## Frequently asked questions

### Is AddCalculator free?

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

### Is LockMemo free?

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

### Do AddCalculator or LockMemo have ads?

Both AddCalculator and LockMemo show ads.

### Which is updated more often, AddCalculator or LockMemo?

AddCalculator ships an update every 5 days, and LockMemo daily. Most recently, AddCalculator was updated on October 4, 2026 and LockMemo on October 12, 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.*