# Unique Days vs Stacked

The clearest difference is review sentiment: Unique Days at 100% against Stacked's 67%. Unique Days also leads on update cadence (monthly vs every 7 months) and rating (5.0 vs 4.6). Stacked's advantage is ratings volume (13 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Unique Days sells 1 one-off in-app purchase and Stacked sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Unique Days holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Stacked has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Unique Days's written reviews are positive against 67% of Stacked's.

Unique Days ships an update monthly, Stacked every 7 months. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Unique Days | Stacked |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/unique-days/id6737198411/reviews)** | [4.6 (13 ratings)](https://appshunter.io/ios/app/stacked-routine-stack-habits/id6740246728/reviews) |
| Number of ratings | 2 | **13** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 61 MB | 61 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [培钦 康](https://appshunter.io/developer/1770425492) | [Tip Tap Apps](https://appshunter.io/developer/1257263778) |

## What reviewers say

### Unique Days

[App page](https://appshunter.io/ios/app/unique-days/id6737198411)

Easily track and countdown to important dates with a user-friendly interface and customizable widgets. Visualize upcoming events with a calendar view and enjoy local data storage for privacy and offline access.

**Highlights:** Home screen widgets, Countdown timers, Event reminders, Customizable backgrounds, Calendar view, Local data storage, Intuitive interface

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 终身会员 | $0.99 | one-time |


### Stacked

[App page](https://appshunter.io/ios/app/stacked-routine-stack-habits/id6740246728)

Build powerful daily routines and track habits with this all-in-one task manager. Combine tasks and habits into customized routines, receive step-by-step guidance, and monitor progress. Offers free and premium features to enhance productivity and time management.

**Highlights:** Create customizable routines, Step-by-step routine guidance, Track habits and tasks together, Flexible task types (free/premium), Progress tracking and statistics, Custom notifications and reminders, Habit stacking technique integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stacked Prime Monthly | $3.99 | per month |
| Stacked Prime Yearly | $17.99 | per year |
| Stacked Prime Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Unique Days free?

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

### Is Stacked free?

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

### Which has better reviews, Unique Days or Stacked?

Unique Days is rated higher. Unique Days averages 5.0 out of 5 from 2 ratings, while Stacked averages 4.6 from 13 ratings.

### Do Unique Days or Stacked have ads?

Neither Unique Days nor Stacked shows ads.

### Which is updated more often, Unique Days or Stacked?

Unique Days ships an update monthly, and Stacked every 7 months. Most recently, Unique Days was updated on September 23, 2026 and Stacked on September 22, 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.*