# Locked Secrets Diary vs Ullam

The clearest difference is in-app purchases: Locked Secrets Diary at none against Ullam's 3. Locked Secrets Diary also leads on update cadence (every 4 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ullam sells 3 in-app purchases, starting at $1.99 per month. Locked Secrets Diary asks for nothing beyond the download.

Locked Secrets Diary ships an update every 4 days, Ullam fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Locked Secrets Diary | Ullam |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 14 MB | 8 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 9+ | 4+ |
| Developer | [Roman Rudych](https://appshunter.io/developer/1883545600) | [Kaspar Works, LLC](https://appshunter.io/developer/6776832950) |

## What reviewers say

### Locked Secrets Diary

[App page](https://appshunter.io/ios/app/locked-secrets-diary/id6760317245)

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

**In-app purchases:** none


### Ullam

[App page](https://appshunter.io/ios/app/ullam-private-diary-and-journal/id6776832948)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ullam Premium | $1.99 | per month |
| Ullam Premium | $14.99 | per year |
| Ullam Premium Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Locked Secrets Diary free?

Locked Secrets Diary is free to download, with no in-app purchases.

### Is Ullam free?

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

### Do Locked Secrets Diary or Ullam have ads?

Neither Locked Secrets Diary nor Ullam shows ads.

### Which is updated more often, Locked Secrets Diary or Ullam?

Locked Secrets Diary ships an update every 4 days, and Ullam fortnightly. Most recently, Locked Secrets Diary was updated on October 31, 2026 and Ullam on November 5, 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.*