# SolarWriter vs Aimfully

The clearest difference is update cadence: Aimfully at every 11 days against SolarWriter's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SolarWriter sells 1 one-off in-app purchase and Aimfully sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

SolarWriter ships an update every 5 months, Aimfully every 11 days. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | SolarWriter | Aimfully |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (16 ratings)](https://appshunter.io/ios/app/solarwriter/id997410577/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Size | 92 MB | 58 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cool S, LLC](https://appshunter.io/developer/997410576) | [HYUK MIN NAM](https://appshunter.io/developer/1778605056) |

## What reviewers say

### SolarWriter

[App page](https://appshunter.io/ios/app/solarwriter/id997410577)

Transform your e-reader into a portable typewriter for outdoor writing. This app connects your keyboard to your e-reader's screen, allowing you to type comfortably on e-ink displays in bright sunlight. Save and share your work easily.

**Highlights:** E-reader integration, External keyboard support, Outdoor writing on e-ink screens, Text mirroring to e-reader, File saving and sharing, Detailed setup instructions

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SolarWriter Pro | $9.99 | one-time |


### Aimfully

[App page](https://appshunter.io/ios/app/aimfully-focus-timer-and-log/id6797261949)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 모노로그 프리미엄 (월간) | $1.99 | per month |
| 모노로그 프리미엄 (연간) | $17.99 | per year |


## Frequently asked questions

### Is SolarWriter free?

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

### Is Aimfully free?

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

### Do SolarWriter or Aimfully have ads?

Neither SolarWriter nor Aimfully shows ads.

### Which is updated more often, SolarWriter or Aimfully?

SolarWriter ships an update every 5 months, and Aimfully every 11 days. Most recently, SolarWriter was updated on September 10, 2026 and Aimfully on September 22, 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.*