# IRF Aurora Alert vs ltl4g

IRF Aurora Alert and ltl4g are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IRF Aurora Alert ships an update every 4 days, ltl4g every 6 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | IRF Aurora Alert | ltl4g |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 days |
| Monetization | Free | — |
| Size | 6 MB | 4 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Swedish Institute of Space Physics](https://appshunter.io/developer/1656031891) | [LTL ACORN](https://appshunter.io/developer/1707752286) |

## What reviewers say

### IRF Aurora Alert

[App page](https://appshunter.io/ios/app/irf-aurora-alert/id6466981930)

Receive timely notifications when the aurora borealis is visible near Kiruna, Sweden. This app helps you predict and experience the northern lights by alerting you to optimal viewing conditions.

**Highlights:** Aurora visibility notifications, Optimized for Kiruna, Sweden, Predicts aurora viewing conditions, Alerts for dark, clear skies, Minimizes light pollution impact

**In-app purchases:** none


### ltl4g

[App page](https://appshunter.io/ios/app/ltl4g/id6754696237)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IRF Aurora Alert free?

IRF Aurora Alert is free to download, with no in-app purchases.

### Is ltl4g free?

ltl4g is free to download, with no in-app purchases.

### Do IRF Aurora Alert or ltl4g have ads?

Neither IRF Aurora Alert nor ltl4g shows ads.

### Which is updated more often, IRF Aurora Alert or ltl4g?

IRF Aurora Alert ships an update every 4 days, and ltl4g every 6 days. Most recently, IRF Aurora Alert was updated on November 3, 2026 and ltl4g on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*