Comparison

Space Letters vs BottleTalk

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Space Letters

Features
Read full description

This app creates a unique experience talking to people across the known galaxy with people which you never would have had any contact in your life otherwise! Write intergalactic letters and ask life's most dire and pressing questions, tell a silly joke or simply send out some love! Instead of writing something entirely new, you can also spend HOURS on end reading what your fellow intergalactic penpals wrote! Its one thing and one thing only: A sh*t ton of fun!

About

BottleTalk

Send anonymous messages in virtual bottles to people worldwide. Discover and reply to messages from others, or create a time capsule for future delivery. Share thoughts and emotions with strangers across the globe.

Highlights
  • Anonymous messaging
  • Virtual bottles
  • Time capsule feature
  • Global communication
  • Message discovery
Features
Read full description

BottleTalk is a late-night mood bottle app for thoughts, voice notes, photo moments, and replies that feel a little closer. Choose an emotional sea, send a bottle, and discover people through mood before profiles. Start with text, a voice note, or a photo moment. Share something honest, playful, or hard to say out loud, then continue only when the reply feels worth it. BottleTalk is built for quiet curiosity, almost-confessions, light chemistry, and mood-matched conversations that move one bottle at a time. Safety and boundaries are built in. You can report content, block accounts, manage account settings, request account deletion, and contact support from the app or website. Key features: - Send and pick mood bottles - Share text, photo moments, and voice notes - Choose emotional seas by mood - Discover replies from people who feel the same - Continue when a reply feels worth it - Use reporting, blocking, moderation, and account controls

Screenshots

Space Letters4 screens
BottleTalk2 screens

Verdict

The call

The clearest difference is in-app purchases: Space Letters at none against BottleTalk's 1. Space Letters also leads on update cadence (daily vs every 4 weeks) and device support (3 vs 1). BottleTalk's advantage is ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BottleTalk sells 1 one-off in-app purchase. Space Letters asks for nothing beyond the download.

UpkeepUpdate frequency

Space Letters ships an update daily, BottleTalk every 4 weeks. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

Scorecard5 real differences · 5 level
Space Letters versus BottleTalk: the parameters behind the verdict, then further details
ParameterSpace LettersBottleTalk
PriceFreeFree
Rating—4.3 (3 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—3 — better
Update frequencyDaily — betterEvery 4 weeks
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.0
Further details — not scored
Size27 MB59 MB
Age rating17+17+
DeveloperPaul Brecht楠 唐

In-app purchases

None

Space Letters

No in-app purchases

1 purchases

BottleTalk

One-time1
  • pick bottle$5.99

Questions

Is Space Letters free?
Space Letters is free to download, with no in-app purchases.
Is BottleTalk free?
BottleTalk is free to download, with in-app purchases available.
Do Space Letters or BottleTalk have ads?
Space Letters shows ads; BottleTalk does not.
Which is updated more often, Space Letters or BottleTalk?
Space Letters ships an update daily, and BottleTalk every 4 weeks. Most recently, Space Letters was updated on October 11, 2026 and BottleTalk on October 4, 2026.

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