Future Letter

Developer: Saki Tsuji

Category: Lifestyle

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15.3K installs

210 ratings

805 monthly active users

$<10K monthly revenue est.

IAP 64% · Ad 36%

Install Trends

Weekly +66

Steady

Monthly +1.2K

Trending

Future Letter Summary

Future Letter is a ad-supported, with in-app purchases Android app in Lifestyle by Saki Tsuji. Released in May 2020 (5 years ago). It has about 15.3K+ installs and 210 ratings with a 3.50★ (average) average. Based on AppGoblin estimates, it reaches roughly 805 monthly active users and generates around $<10K monthly revenue (64% IAP / 36% ads). Store metadata: updated Aug 15, 2025.

Recent activity: 66 installs this week (1.2K over 4 weeks) showing exceptional growth View trends →

Store info: Last updated on Google Play on Aug 15, 2025 .

SDKs, Trackers & Permissions

App not yet scanned for SDKs.

App Details

Store ID: com.flutter.tsuji.hitoshi.spacetimeletter

First Released: 2020-05-08

Store Last Updated: 2025-08-15

In-App Purchases: Yes

Ads: Yes

Website: space-time-letter.web.app

App Store

Crawl Status: Success

AppGoblin First Crawled: 2025-04-03

AppGoblin Last Crawled: 2026-04-13

Ads & App-Ads.txt

Ads.txt Last Crawled: 2025-10-17

Ads.txt Crawl Status: Success

AppGoblin SDK Scans

App not yet analyzed for SDKs.

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3.5★

Ratings: 210

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Screenshots

App Description

Future Letter is an app that allows you to send letters to your future self.

This app allows you to send a letter to your future self.

It has a simple design and is intuitive to use.

You can set the letter to be delivered at a specified time, and it will notify you when the letter arrives.
You can send a letter even years in advance. As long as you don't delete the app, you can receive it at any time.

The app has a passcode lock, so you don't have to worry about anyone seeing the contents of your letters. (Some models are not compatible with this function.

When I was in elementary school, I put my letters in a small can and opened it at my coming-of-age ceremony, which was fun, so I made this app.
I would be very happy if you could give me any feedback or suggestions on how I can improve this app.

Please download it and try the magical experience of receiving a letter from your past self!