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I built an app that gives your family your letters and passwords after you die. It launched on the App Store today.

Hey r/SideProject ! I'm a CS undergrad and I just got my app Seal approved on the App Store this morning. Really excited about this one, it's my best app by far. The main idea is it uses cryptography and real physical keys to seal envelopes of your voice, text, photos, etc... for chosen loved ones or friends that open after a long period of silence from you. Some backstory: I built the whole thing with Claude (AI coding assistant). Apple rejected it the first time because the reviewer co

五维评分

付费意愿
45
需求真实度
55
个人可落地
85
竞争空间
30
新鲜度
40

AI 分析

痛点:人去世或长期失联后,重要的信件、密码和私人消息无法安全、自动地传给家人,现有做法要么靠手动整理,要么不加密。

目标用户:关注数字遗产与身后事安排的 iPhone/iPad 用户,通常是 25-50 岁、有家庭或数字资产需要传承的人。

证据:I built an app that gives your family your letters and passwords after you die. / Apple rejected it the first time because the reviewer couldn't find the in-app purchase. / For 1.1 I'm deciding between: A weekly interview thing... or A web page for heirs... Which would you b[e]?

变现:免费下载 + 内购/订阅解锁更多收件人、更大存储或硬件密钥支持;后续可做遗产规划机构、保险公司的 B2B 授权。

MVP:2 周版最小可行产品:只做「心跳签到 + 加密留言」——用户定期签到,超过 N 天未签到则自动通过邮件/浏览器链接把加密内容发给指定收件人,不做硬件密钥和端到端花哨功能。

竞品:Apple Digital Legacy (免费内置)、Google Inactive Account Manager (免费)、1Password Emergency Access、Everplans、Trustworthy、Cake (legacy planning)

摘要:一名 CS 本科生用 Claude 辅助开发并上架了 iOS 应用 Seal,用硬件密钥 + CryptoKit 加密,在用户 90 天无活动后把信件、密码等内容交给指定家人。帖子给出了完整技术路径和真实上架经历(首次因审核员找不到内购被拒),说明该品类存在内购变现模式,但没有披露任何收入或付费用户数据。该方向有真实需求,但 Apple/Google 均提供免费的数字遗产功能,且已有 Everplans、Trustworthy 等成熟付费竞品,竞争空间有限。