# F vs SOLAR

The clearest difference is price: F at Free against SOLAR's $2.99. F also leads on iOS requirement (15.6 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

F is free to download; SOLAR costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

F ships an update every 3 weeks, SOLAR every 2 weeks. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | F | SOLAR |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/f-tell/id916724641/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 49 MB | 20 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Globex Telecom Group Limited](https://appshunter.io/developer/1498774689) | [timothe marcellin](https://appshunter.io/developer/6810464369) |

## What reviewers say

### F

[App page](https://appshunter.io/ios/app/f-tell/id916724641)

This app allows you to manage multiple international phone numbers on a single SIM or eSIM. It redefines convenience for global communication, enabling you to appear local in over 90 countries with smart caller ID features.

**Highlights:** Multi-number technology, Add numbers from 90+ countries, Patented Smart CLI technology, Transfer existing phone numbers, Monitor usage and billing, AutoPay enrollment

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 F free?

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

### Is SOLAR free?

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

### Do F or SOLAR have ads?

Neither F nor SOLAR shows ads.

### Which is updated more often, F or SOLAR?

F ships an update every 3 weeks, and SOLAR every 2 weeks. Most recently, F was updated on October 24, 2026 and SOLAR on October 29, 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.*