# Knowe Astro：Birth Chart vs AgeFlash

The clearest difference is ads: Knowe Astro：Birth Chart at none against AgeFlash's shown. Knowe Astro：Birth Chart also leads on update cadence (every 4 days vs every 3 weeks). AgeFlash's advantage is iOS requirement (15.1 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Knowe Astro：Birth Chart sells 4 in-app purchases, starting at $4.99 per month and AgeFlash sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Knowe Astro：Birth Chart ships an update every 4 days, AgeFlash every 3 weeks. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Knowe Astro：Birth Chart | AgeFlash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knowe-astrobirth-chart/id6752608152/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 22 MB | 64 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [占辉 百](https://appshunter.io/developer/1081455103) | [SOMMER Media s.r.o.](https://appshunter.io/developer/1716179984) |

## What reviewers say

### Knowe Astro：Birth Chart

[App page](https://appshunter.io/ios/app/knowe-astrobirth-chart/id6752608152)

This app generates detailed natal charts, synastry comparisons, and transit readings. It offers AI-powered interpretations and includes a built-in astrology library for in-depth study. Ideal for both beginners and experienced astrologers seeking a clear workspace.

**Highlights:** Accurate natal and birth charts, Synastry and compatibility analysis, Transit tracking and timing, AI chart interpretation, In-app astrology library, Detailed placement study

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Membership | $4.99 | per month |
| Monthly Ultra Membership | $6.99 | per month |
| Yearly Pro Membership | $19.99 | per year |
| Yearly Ultra Membership | $29.99 | per year |


### AgeFlash

[App page](https://appshunter.io/ios/app/ageflash-age-calculator/id6767207668)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AgeFlash Pro - Lifetime | $1.99 | one-time |


## Frequently asked questions

### Is Knowe Astro：Birth Chart free?

Knowe Astro：Birth Chart is free to download, with in-app purchases available.

### Is AgeFlash free?

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

### Do Knowe Astro：Birth Chart or AgeFlash have ads?

AgeFlash shows ads; Knowe Astro：Birth Chart does not.

### Which is updated more often, Knowe Astro：Birth Chart or AgeFlash?

Knowe Astro：Birth Chart ships an update every 4 days, and AgeFlash every 3 weeks. Most recently, Knowe Astro：Birth Chart was updated on September 29, 2026 and AgeFlash on October 2, 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.*