# Days until my birthday vs OpEvol

The clearest difference is price: OpEvol at Free against Days until my birthday's $0.99. OpEvol also leads on ads (none vs shown) and update cadence (every 22 months vs every 53 months). Days until my birthday's advantage is in-app purchases (none vs 1) and review sentiment (48% vs 27%). On device support there is nothing between them.

OpEvol is free to download; Days until my birthday costs $0.99 up front. OpEvol sells 1 in-app purchase, starting at $6.99 per year. Days until my birthday asks for nothing beyond the download.

Days until my birthday ships an update every 53 months, OpEvol every 22 months. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Days until my birthday | OpEvol |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.3 (26 ratings)](https://appshunter.io/ios/app/days-until-my-birthday/id627831738/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | **48.3% of reviews** | 27.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 53 months | **Every 22 months** |
| Monetization | **Ad-supported** | Paid |
| Size | 26 MB | 3 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [H Valeur](https://appshunter.io/developer/621824042) | [Muddlegeist](https://appshunter.io/developer/701677888) |

## What reviewers say

### Days until my birthday

[App page](https://appshunter.io/ios/app/days-until-my-birthday/id627831738)

This app helps you track the days remaining until your birthday with personalized insights. It offers a countdown, zodiac information, and fun games to enjoy while you wait for your special day.

**Highlights:** Birthday countdown, Personalized insights (zodiac, birthstone), Milestone tracking, Simple games included, Private data storage

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

**In-app purchases:** none


### OpEvol

[App page](https://appshunter.io/ios/app/opevol/id788355019)

Experience a dynamic, ever-changing display of psychedelic visuals inspired by 1960s Op Art. This app creates animated fields of geometric colors and contrasts for passive viewing or interactive play.

**Highlights:** Animated geometric patterns, Op Art inspired visuals, Psychedelic color displays, Interactive visual play, Air Display compatibility

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpEvol Annual Subscription | $6.99 | per year |


## Frequently asked questions

### Is Days until my birthday free?

Days until my birthday costs $0.99, with no in-app purchases.

### Is OpEvol free?

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

### Do Days until my birthday or OpEvol have ads?

Days until my birthday shows ads; OpEvol does not.

### Which is updated more often, Days until my birthday or OpEvol?

Days until my birthday ships an update every 53 months, and OpEvol every 22 months. Most recently, Days until my birthday was updated on October 14, 2026 and OpEvol on September 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.*