# SolarFocus vs Rostrum

The clearest difference is in-app purchases: Rostrum at none against SolarFocus's 3. Rostrum also leads on update cadence (daily vs weekly). SolarFocus's advantage is iOS requirement (16.4 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. SolarFocus sells 3 in-app purchases, starting at $1.99 per month. Rostrum asks for nothing beyond the download.

SolarFocus ships an update weekly, Rostrum daily. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | SolarFocus | Rostrum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rostrum-speaker-timer/id6797343777/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | — | Free |
| Size | 42 MB | 1 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [厚然 曾](https://appshunter.io/developer/1804756359) | [Scott GREER](https://appshunter.io/developer/1889757381) |

## What reviewers say

### SolarFocus

[App page](https://appshunter.io/ios/app/solarfocus-space-pomodoro/id6744120438)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 行星专注 Pro - 月度订阅 | $1.99 | per month |
| 专注行星 Pro - 年度订阅 | $5.99 | per year |
| SolarFocus Pro - Lifetime | $17.99 | one-time |


### Rostrum

[App page](https://appshunter.io/ios/app/rostrum-speaker-timer/id6797343777)

This app provides a silent, visual countdown timer for speakers, with customizable color cues to indicate time remaining. It offers intuitive gesture controls for adjustments and can mirror the display to a larger screen.

**Highlights:** Silent visual countdown, Customizable color stages, Gesture-based editing, External display mirroring, Never dims screen, Remembers settings

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SolarFocus free?

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

### Is Rostrum free?

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

### Do SolarFocus or Rostrum have ads?

Neither SolarFocus nor Rostrum shows ads.

### Which is updated more often, SolarFocus or Rostrum?

SolarFocus ships an update weekly, and Rostrum daily. Most recently, SolarFocus was updated on October 15, 2026 and Rostrum on October 10, 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.*