订阅条款
生效日期：2026-05-30
KnowLetter 提供以下订阅选项，帮助您解锁全部 7 个字母认知关卡。
一、订阅产品
| 产品 |
价格 |
说明 |
| 终身解锁 |
¥18 |
一次买断，永久享有全部 7 关 |
| 月订阅 |
¥6/月 |
每月自动续费，含 3 天免费试用 |
| 年订阅 |
¥38/年 |
按年自动续费，含 3 天免费试用 |
二、免费试用
- 月订阅和年订阅均提供 3 天免费试用期
- 试用期内可随时取消，不会产生任何费用
- 试用期结束后如未取消，将自动开始扣费
三、自动续费
- 订阅到期前 24 小时内，Apple 将自动从您的 Apple ID 账户扣费
- 月订阅按月自动续费，年订阅按年自动续费
- 您可以随时在 iOS 设置 > Apple ID > 订阅 中管理或取消订阅
四、退款政策
- 订阅服务的退款由 Apple 处理，请通过 Apple 官方渠道申请
- 终身买断产品一经购买，不支持退款
五、订阅变更
- 我们保留调整订阅价格的权利，价格变更将在续期前通知
- 已生效的订阅在到期前不受价格变更影响
六、联系我们
Subscription Terms
Effective Date: 2026-05-30
KnowLetter offers the following subscription options to help you unlock all 7 letter recognition levels.
1. Subscription Products
| Product |
Price |
Description |
| Lifetime Unlock |
¥18 |
One-time purchase, permanent access to all 7 levels |
| Monthly |
¥6/month |
Auto-renews monthly, includes 3-day free trial |
| Yearly |
¥38/year |
Auto-renews yearly, includes 3-day free trial |
2. Free Trial
- Both monthly and yearly subscriptions include a 3-day free trial
- You can cancel anytime during the trial period without any charges
- If not cancelled before the trial ends, billing will begin automatically
3. Auto-Renewal
- Within 24 hours before your subscription expires, Apple will automatically charge your Apple ID account
- Monthly subscriptions renew monthly; yearly subscriptions renew yearly
- You can manage or cancel subscriptions anytime in iOS Settings > Apple ID > Subscriptions
4. Refund Policy
- Refunds for subscription services are handled by Apple; please apply through Apple’s official channels
- Lifetime purchase products are non-refundable once purchased
5. Subscription Changes
- We reserve the right to adjust subscription prices; price changes will be notified before renewal
- Active subscriptions are not affected by price changes until they expire