# SKI+ vs KOFO, focus for work and study

The clearest difference is price: SKI+ at Free against KOFO, focus for work and study's $3.99. SKI+ also leads on in-app purchases (none vs 6) and ads (none vs shown). KOFO, focus for work and study's advantage is review sentiment (91% vs 67%) and update cadence (every 5 days vs every 3 weeks). On device support and iOS requirement there is nothing between them.

SKI+ is free to download; KOFO, focus for work and study costs $3.99 up front. KOFO, focus for work and study sells 6 in-app purchases, starting at $0.99 per 7 days. SKI+ asks for nothing beyond the download.

SKI+ ships an update every 3 weeks, KOFO, focus for work and study every 5 days. The most recent releases landed on October 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SKI+ | KOFO, focus for work and study |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | 66.7% of reviews | **91.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 127 MB | 51 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Academia Sinica Research Center for Information Technology Innovation](https://appshunter.io/developer/432286895) | [Sunfun Info Co., Ltd.](https://appshunter.io/developer/473615250) |

## What reviewers say

### SKI+

[App page](https://appshunter.io/ios/app/ski-plus/id1347443378)

A secure messaging app that uses end-to-end encryption for private communication. All message encryption and decryption happen on your device, ensuring your conversations are protected from unauthorized access.

**Highlights:** End-to-end message encryption, Decentralized encryption on device, Secure communication, Photo and video sharing, Location sharing, Contact integration

**Features:** macOS Compatibility

**In-app purchases:** none


### KOFO, focus for work and study

[App page](https://appshunter.io/ios/app/kofo-focus-for-work-and-study/id6468551669)

Enhance your focus and productivity by growing a virtual forest. Earn coins through focused sessions to plant real trees and support wildlife conservation efforts. Join a community dedicated to making a positive environmental impact.

**Highlights:** Gameplay meets focus, Real-world reforestation impact, Task management and achievements, Wildlife awareness, Virtual tree growth, Coin accumulation for real trees

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Boost | $0.99 | per 7 days |
| Monthly Boost | $2.99 | per month |
| 30 Rubies | $0.99 | one-time |
| 160 Rubies | $4.99 | one-time |
| 380 Rubies | $9.99 | one-time |
| 800 Rubies | $19.99 | one-time |

**What reviewers like**

- 🌳 Meaningful environmental impact
- 🍅 Effective focus tool (Pomodoro)
- 🌿 Cute and appealing interface
- 👍 User-friendly and simple design
- 💡 Innovative concept combining focus and trees

**What reviewers complain about**

- 🐛 App crashes or fails on screen off
- 🌳 Trees not growing or dying
- 🐛 Page switching issues
- 🐛 Planting not successful

**Reported bugs**

- Screen off causes automatic failure
- Cannot switch pages
- Trees die or do not grow successfully
- Planting fails

**Requested features**

- More diverse animal options (e.g., koalas)
- Ability to view others' diary entries
- Tagging system for diary entries
- More content and features
- Sound notifications for focus timer


## Frequently asked questions

### Is SKI+ free?

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

### Is KOFO, focus for work and study free?

KOFO, focus for work and study costs $3.99, and also offers in-app purchases.

### Do SKI+ or KOFO, focus for work and study have ads?

KOFO, focus for work and study shows ads; SKI+ does not.

### Which is updated more often, SKI+ or KOFO, focus for work and study?

SKI+ ships an update every 3 weeks, and KOFO, focus for work and study every 5 days. Most recently, SKI+ was updated on October 4, 2026 and KOFO, focus for work and study on October 30, 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.*