SKI+ vs KOFO, focus for work and study
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SKI+
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.
- End-to-end message encryption
- Decentralized encryption on device
- Secure communication
- Photo and video sharing
- Location sharing
- Contact integration
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SKI+ 是一個點對點訊息加解密的通訊APP,使用者在互傳訊息時,可以在非常安全狀態下進行,不會被駭客竊取通訊訊息. 歡迎下載使用. 訊息的加密及解密計算由手機端完成 伺服器端無法得知加解密細節 因此為對使用者更有隱私保障的訊息系統 所用到的「敏感個資」包括: .MobilePhone Number(電話號碼) 電話號碼僅用來做簡訊驗證,及註冊身份使用,不會做任何其它用途。 所用到的「敏感隱私權」包括: ・Notifications(通知) 該權限讓App能接收推播訊息。 ・Camera(相機) 該權限用於拍照及錄製影像。使用者得以傳送照片及影音訊息,拍照以上傳大頭照。 ・Microphone(麥克風) 該權限用於錄製並發送聲音訊息、或影片訊息。 ・Location Services(位置) 該權限用於Google Map以顯示地圖及位置。使用者得以發送位置訊息。 ・Photos(相册) 該權限讓使用者可以發送圖片或影片訊息。 ・Contacts(聯絡人) 該權限用於讀取使用者的聯絡人清單。使用者得以從聯絡人清單中直接添加好友。 使用問題或建議 歡迎將相關描述或抓圖寄到: ziv@citi.sinica.edu.tw 我們會盡快處理您的問題
KOFO, focus for work and study
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.
- Gameplay meets focus
- Real-world reforestation impact
- Task management and achievements
- Wildlife awareness
- Virtual tree growth
- Coin accumulation for real trees
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KOFO, KoalaForest - Focus, Play, Save Nature and Wildlife! Join Now and Plant a Tree: Be one of the first million users to download and become a member, and we'll plant a real tree in your honor! Our Mission: - Planting 10,000,000 trees worldwide, - Restore 100,000 koalas and other wildlife In a world buzzing with technology, KOFO is your digital oasis where focus, fun, and nature conservation come together. We believe in the power of productivity and the importance of protecting our natural world. Key Features: 1) Gameplay Meets Focus: KOFO isn't just about productivity; it's about nurturing your focus while contributing to a greener planet. Plant virtual trees that represent your focused work, study, and exercise sessions. Your virtual forest is a symbol of your commitment to preserving nature. 2) Real-world Impact: Every tree you grow virtually could contributes to real-world reforestation. Earn coins could be converted to planting real trees and safeguarding the homes of wildlife. 3) Task Management and Achievements: Turn your daily tasks into an adventure. Set goals, track your progress, and earn achievements while protecting the environment. 4) Wildlife Awareness: Stay informed about wildlife conservation efforts and learn about our commitment to nurturing koalas and protecting their habitats. 5) Join our vibrant community, focus on your tasks, and make a real impact by helping save the environment and wildlife, one virtual tree at a time. Easy to Use: 1)Assign various tags to your focused sessions. 2) Establish a time target for your concentration. 3) Initiate your focus mode! Place your phone aside and concentrate on your objective. 4) Accumulate Coins and nurture a virtual tree. 5)Use your Coins to plant real trees and make a positive impact on our world! --------------------------------------------------------------- In App Purchases include: Rubies: 30 Rubies $0.99 160 Rubies $4.99 380 Rubies $9.99 800 Rubies$19.99 Boost (Subscription) Weekly BOOST Subscription : 1 week BOOST $0.99 Monthly BOOST Subscription : 1 month BOOST $2.99 Subscription: Cancel anytime. The subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current period. No cancellation of the current subscription is allowed during the active subscription period. Your account will be charged for renewal within 24 hours prior to the end of the current period and will identify the cost of the renewal. Subscriptions may be managed by the user, and auto-renewal may be turned off by going to the user's Account Settings after purchase. Payment will be charged to the App Store Account upon confirmation of purchase. By continuing, you accept our Terms and Policy. Terms:https://koalaforest.org/terms.php Policy:https://koalaforest.org/policy.php
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SKI+ | KOFO, focus for work and study |
|---|---|---|
| Price | Free — better | $3.99 |
| Positive reviews | 66.7% of reviews | 91.4% of reviews — better |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 127 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Academia Sinica Research Center for Information Technology Innovation | Sunfun Info Co., Ltd. |
Customer experience
SKI+
KOFO, focus for work and study
Bugs and requests
SKI+
Not enough reviews yet to summarise bugs or requests.
KOFO, focus for work and study
Reported bugs
4 issues- Screen off causes automatic failure
- Cannot switch pages
- Trees die or do not grow successfully
- Planting fails
Requested features
6 requests- 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
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- More options to help the Earth
In-app purchases
SKI+
No in-app purchases
KOFO, focus for work and study
- Weekly Boost$0.997 Days
- Monthly Boost$2.991 Month
- 30 Rubies$0.99
- 160 Rubies$4.99
- 380 Rubies$9.99
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- 800 Rubies$19.99
Questions
Is SKI+ free?
Is KOFO, focus for work and study free?
Do SKI+ or KOFO, focus for work and study have ads?
Which is updated more often, SKI+ or KOFO, focus for work and study?
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