# Memento Database vs I.O.

The clearest difference is update cadence: I.O. at every 2 days against Memento Database's every 3 months. I.O. also leads on iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Memento Database sells 10 in-app purchases, starting at $3.99 per month and I.O. sells 1 in-app purchase, starting at $10.00 per month. Whichever you choose, the download price is not the number that matters.

Memento Database ships an update every 3 months, I.O. every 2 days. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Memento Database | I.O. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (308 ratings)](https://appshunter.io/ios/app/memento-database/id1583610478/reviews)** | — |
| Number of ratings | **308** | — |
| Positive reviews | 57.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 34 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [MementoDB Inc.](https://appshunter.io/developer/1583610480) | [IO.OI. Inc.](https://appshunter.io/developer/1891882426) |

## What reviewers say

### Memento Database

[App page](https://appshunter.io/ios/app/memento-database/id1583610478)

Organize and manage any type of information with customizable databases. Adaptable for personal lists, business management, and research, it offers a flexible alternative to spreadsheets and specialized apps. Features include offline access, cloud syncing, and an AI assistant for effortless data structuring.

**Highlights:** Customizable database creation, AI Assistant for data structuring, Offline data management, Cloud synchronization, Teamwork with access control, Desktop access for Mac/PC, Extensive field types

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lite | $3.99 | per month |
| Pro | $7.99 | per month |
| Pro Plus | $11.99 | per month |
| Team 5 | $29.99 | per month |
| Lite | $35.99 | per year |
| Team 10 | $59.99 | per month |
| Pro | $71.99 | per year |
| Pro Plus | $107.99 | per year |
| Team 5 | $299.99 | per year |
| Team 10 | $599.99 | per year |

**What reviewers like**

- 👍 Easy to use and operate
- 👍 Smooth and professional interface
- 👍 Great for organizing collections
- 👍 Flexible and capable app
- 👍 Useful for various tracking needs

**What reviewers complain about**

- 💰 Expensive long-term cost
- 🐛 No decent way to back up photos
- 🐛 Backup and restore doesn't work for photos
- 🐛 Import doesn't work for photos
- 🐛 Unethical pricing changes

**Reported bugs**

- Add new selection list items bug
- Add field window disappears too quickly
- App crashes on opening
- App crashes multiple times during every use on iOS
- App keeps crashing on Apple tablet

**Requested features**

- Add shade name for color field
- Add autocomplete for tags
- Edit background color for iOS app
- Add folder system for databases
- Add wizard on iOS


### I.O.

[App page](https://appshunter.io/ios/app/io/id6761871771)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IO Pro | $10.00 | per month |


## Frequently asked questions

### Is Memento Database free?

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

### Is I.O. free?

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

### Do Memento Database or I.O. have ads?

Neither Memento Database nor I.O. shows ads.

### Which is updated more often, Memento Database or I.O.?

Memento Database ships an update every 3 months, and I.O. every 2 days. Most recently, Memento Database was updated on October 5, 2026 and I.O. on October 7, 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.*