# Birthday assistant app vs SOLAR

The clearest difference is price: Birthday assistant app at Free against SOLAR's $2.99. Birthday assistant app also leads on iOS requirement (15.6 vs 18.0). SOLAR's advantage is in-app purchases (none vs 1). On update cadence, ads and device support there is nothing between them.

Birthday assistant app is free to download; SOLAR costs $2.99 up front. Birthday assistant app sells 1 one-off in-app purchase. SOLAR asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Birthday assistant app | SOLAR |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/birthday-assistant-app/id1508444645/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 70 MB | 25 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [小花 邓](https://appshunter.io/developer/1327670424) | [timothe marcellin](https://appshunter.io/developer/6810464369) |

## What reviewers say

### Birthday assistant app

[App page](https://appshunter.io/ios/app/birthday-assistant-app/id1508444645)

This app helps you remember important dates like birthdays, anniversaries, and festivals. It sends automatic reminders and offers tools for sending greeting cards and invitations, ensuring you never miss a special occasion.

**Highlights:** Birthday reminders, Lunar calendar support, Countdown timers, Greeting card creation, Invitation sending, Photo book integration, 7-day weather forecast

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一年会员功能使用购买 | $5.99 | one-time |


### SOLAR

[App page](https://appshunter.io/ios/app/solar-sun-tracker-and-time/id6810464367)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Birthday assistant app free?

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

### Is SOLAR free?

SOLAR costs $2.99, with no in-app purchases.

### Do Birthday assistant app or SOLAR have ads?

Neither Birthday assistant app nor SOLAR shows ads.

### Which is updated more often, Birthday assistant app or SOLAR?

Birthday assistant app ships an update fortnightly, and SOLAR fortnightly. Most recently, Birthday assistant app was updated on November 3, 2026 and SOLAR on November 6, 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.*