# REINER SCT Authenticator vs Tagaeff Solar Forecaster

The clearest difference is in-app purchases: REINER SCT Authenticator at none against Tagaeff Solar Forecaster's 2. REINER SCT Authenticator also leads on iOS requirement (15.0 vs 18.6). Tagaeff Solar Forecaster's advantage is update cadence (every 8 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Tagaeff Solar Forecaster sells 2 in-app purchases, starting at $3.99 per month. REINER SCT Authenticator asks for nothing beyond the download.

REINER SCT Authenticator ships an update every 5 weeks, Tagaeff Solar Forecaster every 8 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | REINER SCT Authenticator | Tagaeff Solar Forecaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Size | 178 MB | 6 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REINER SCT](https://appshunter.io/developer/635800415) | [Marsel Tagaev](https://appshunter.io/developer/1832147875) |

## What reviewers say

### REINER SCT Authenticator

[App page](https://appshunter.io/ios/app/reiner-sct-authenticator/id6757697786)

**In-app purchases:** none


### Tagaeff Solar Forecaster

[App page](https://appshunter.io/ios/app/tagaeff-solar-forecaster/id6767835704)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solar Forecast Pro Annual | $3.99 | per month |
| Solar Forecast PRO | $29.99 | per year |


## Frequently asked questions

### Is REINER SCT Authenticator free?

REINER SCT Authenticator is free to download, with no in-app purchases.

### Is Tagaeff Solar Forecaster free?

Tagaeff Solar Forecaster is free to download, with in-app purchases available.

### Do REINER SCT Authenticator or Tagaeff Solar Forecaster have ads?

Neither REINER SCT Authenticator nor Tagaeff Solar Forecaster shows ads.

### Which is updated more often, REINER SCT Authenticator or Tagaeff Solar Forecaster?

REINER SCT Authenticator ships an update every 5 weeks, and Tagaeff Solar Forecaster every 8 days. Most recently, REINER SCT Authenticator was updated on October 28, 2026 and Tagaeff Solar Forecaster on October 24, 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.*