AddCalculator vs LockMemo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AddCalculator
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.
- Automatic addition on number press
- Customizable number buttons
- Calculation history log
- Undo and redo functionality
- Dual color mode support
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- Each time you press a number, it automatically adds up, allowing you to calculate the sum quickly. - You can create a button by specifying the number you want. - You can check the history of calculated numbers at any time. - You can undo and redo. - Supports two color modes.
LockMemo
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Lock Screen Memo puts shopping lists, reminders, and to-dos on your Lock Screen and Home Screen widgets—see what matters without unlocking your phone. Perfect for: - Shopping lists and to-dos at a glance - Password hints, meeting times, gate numbers - Color-coded sticky notes by category - Sharing lists or trip notes with family and friends Features: - Pin sticky notes on a wood board - Organize by category with custom colors - Display on Home and Lock Screen widgets - Shared memo: invite link (auto-join) or 8-digit code; join multiple boards—all appear on your home board; everyone edits together (Shared tab at the bottom) - Configurable font, size, and color - Choose backgrounds and mascots for the home look - Follows your device's light or dark appearance Simple, lightweight, and built to fit into your daily routine.
Screenshots
Verdict
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.
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. 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.
| Parameter | AddCalculator | LockMemo |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 5 days | Daily — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Minseong Kim | Yui Sakamoto |
In-app purchases
AddCalculator
No in-app purchases
LockMemo
No in-app purchases
