# Local Sidereal Time vs Tagtory

The clearest difference is update cadence: Tagtory at every 2 days against Local Sidereal Time's every 4 months. Local Sidereal Time's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Local Sidereal Time sells 1 one-off in-app purchase and Tagtory sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Local Sidereal Time ships an update every 4 months, Tagtory every 2 days. The most recent releases landed on September 26, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Local Sidereal Time | Tagtory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/local-sidereal-time/id1256725300/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 70.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 12 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Scott Spiller](https://appshunter.io/developer/1256725299) | [ZEYI YAN](https://appshunter.io/developer/1873673136) |

## What reviewers say

### Local Sidereal Time

[App page](https://appshunter.io/ios/app/local-sidereal-time/id1256725300)

This app calculates local sidereal time, a system astronomers use to locate celestial objects. It can also be used for personal development, with studies suggesting increased psychic abilities during specific sidereal times. The pro version offers advanced features like notifications and map-based calculations.

**Highlights:** Calculate local sidereal time, Astronomy celestial object location, Potential psychic ability enhancement, Pro version notifications, Pro version map-based calculation, Pro version date/time conversion

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Useful app
- 💡 Helpful notifications
- 👍 Great customer service
- 💡 Excellent tool

**What reviewers complain about**

- 🐛 Alarm doesn't work
- 🐛 Crashes frequently
- 🔒 Pro purchase issues
- 🐛 Notification issues

**Reported bugs**

- Alarm doesn't work
- Crashes when loading
- Notification issues
- Pro purchase restoration not working

**Requested features**

- Add alarm feature
- Allow setting location manually
- Improve notification handling
- Automatically adjust for daylight saving time


### Tagtory

[App page](https://appshunter.io/ios/app/tagtory/id6758564754)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tagtory Pro Monthly | $2.99 | per month |
| Tagtory Pro Yearly | $24.99 | per year |
| Tagtory Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Local Sidereal Time free?

Local Sidereal Time is free to download, with in-app purchases available.

### Is Tagtory free?

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

### Do Local Sidereal Time or Tagtory have ads?

Neither Local Sidereal Time nor Tagtory shows ads.

### Which is updated more often, Local Sidereal Time or Tagtory?

Local Sidereal Time ships an update every 4 months, and Tagtory every 2 days. Most recently, Local Sidereal Time was updated on September 26, 2026 and Tagtory on September 19, 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.*