# Countdown to Big Day vs One Diary!

The clearest difference is in-app purchases: Countdown to Big Day at none against One Diary!'s 3. Countdown to Big Day also leads on ads (none vs shown) and ratings volume (6 vs 2). One Diary!'s advantage is review sentiment (91% vs 59%) and rating (4.5 vs 4.3). On price and device support there is nothing between them.

Countdown to Big Day costs $0.99 and One Diary! $0.99 up front. One Diary! sells 3 one-off in-app purchases. Countdown to Big Day asks for nothing beyond the download.

One Diary! holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 59% of Countdown to Big Day's written reviews are positive against 91% of One Diary!'s.

Countdown to Big Day ships an update every 5 weeks, One Diary! fortnightly. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Countdown to Big Day | One Diary! |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/countdown-to-big-day/id404523899/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/one-diary/id1359597080/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 58.7% of reviews | **91.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 57 MB |
| Requires iOS | 14.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Igor Kravtsov](https://appshunter.io/developer/404523902) | [岚 甘](https://appshunter.io/developer/1228166609) |

## What reviewers say

### Countdown to Big Day

[App page](https://appshunter.io/ios/app/countdown-to-big-day/id404523899)

Track important dates with a simple countdown. See how many days remain until your next event or how many have passed since a past one. Never miss a special occasion again.

**Highlights:** Add event titles and dates, Format countdown timers, Set dates in past or future, Edit and delete events, Receive event due date notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### One Diary!

[App page](https://appshunter.io/ios/app/one-diary/id1359597080)

Easily record your daily life with beautiful templates and summaries. This app helps you build a habit of journaling, offers secure storage, and allows sharing your memories.

**Highlights:** Daily diary entries, Beautiful diary templates, Cloud backup and sync, Shareable diary cards, Daily writing reminders, Password protection, PDF export

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| cup of drink | $0.99 | one-time |
| doughnut | $1.99 | one-time |
| steak | $4.99 | one-time |


## Frequently asked questions

### Is Countdown to Big Day free?

Countdown to Big Day costs $0.99, with no in-app purchases.

### Is One Diary! free?

One Diary! costs $0.99, and also offers in-app purchases.

### Which has better reviews, Countdown to Big Day or One Diary!?

One Diary! is rated higher. Countdown to Big Day averages 4.3 out of 5 from 6 ratings, while One Diary! averages 4.5 from 2 ratings.

### Do Countdown to Big Day or One Diary! have ads?

One Diary! shows ads; Countdown to Big Day does not.

### Which is updated more often, Countdown to Big Day or One Diary!?

Countdown to Big Day ships an update every 5 weeks, and One Diary! fortnightly. Most recently, Countdown to Big Day was updated on October 16, 2026 and One Diary! 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.*