# Memossage vs Missing Number Calculator

The clearest difference is price: Memossage at Free against Missing Number Calculator's $0.99. Memossage also leads on iOS requirement (15.1 vs 17.0). Missing Number Calculator's advantage is ads (none vs shown) and update cadence (every 3 days vs monthly). On in-app purchases and device support there is nothing between them.

Memossage is free to download; Missing Number Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Memossage ships an update monthly, Missing Number Calculator every 3 days. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Memossage | Missing Number Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/memossage-note-like-you-chat/id6739771663/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 37 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [JONGWOO LEE](https://appshunter.io/developer/1786959665) | [Infinity Inc. (Apps)](https://appshunter.io/developer/1680741877) |

## What reviewers say

### Memossage

[App page](https://appshunter.io/ios/app/memossage-note-like-you-chat/id6739771663)

Capture thoughts effortlessly with a chat-style interface. Organize notes into personalized spaces and find them instantly with smart keyword search. Enjoy a simple, intuitive experience designed for quick access to your information.

**Highlights:** Chat-style note taking, Personalized note spaces, Smart keyword search, Light and dark themes, Available in 13 languages, Continuous improvement

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

**In-app purchases:** none


### Missing Number Calculator

[App page](https://appshunter.io/ios/app/missing-number-calculator/id6747973776)

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

**In-app purchases:** none


## Frequently asked questions

### Is Memossage free?

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

### Is Missing Number Calculator free?

Missing Number Calculator costs $0.99, with no in-app purchases.

### Do Memossage or Missing Number Calculator have ads?

Memossage shows ads; Missing Number Calculator does not.

### Which is updated more often, Memossage or Missing Number Calculator?

Memossage ships an update monthly, and Missing Number Calculator every 3 days. Most recently, Memossage was updated on November 4, 2026 and Missing Number Calculator on October 30, 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.*