SkyPost vs OnceChat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SkyPost
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If thoughts had a physical form, they would be visual postcards drifting across the world map. SkyPost is a romantic, geo-sensory slow-social experience that reimagines the classic "Message in a Bottle" for the digital world. Leave the noisy feeds and swiping fatigue behind. Every DandiSeed sent into the world is a heartfelt postcard created by you—combining original sketches or real-life photography with voice recordings and mindful notes. Simply drop a pin on the map and send your postcard to an unfamiliar friend across the planet. Discover quiet connections with gentle souls across continents. [ KEY FEATURES ] [ Visual Postcard Canvas: Drawings & Photos ] Every dandelion seed requires a visual touch to make it truly personal: - Freehand Doodles & Sketches: Built-in creative canvas to sketch landscapes, doodle feelings, or write handwritten notes. - Real-Life Photos: Upload a captured moment—a quiet sunset, a cozy café, or a travel memory. - Photo + Doodle Overlays: Add hand-drawn doodles and personal handwriting directly on top of your photos. - Voice & Thought Notes: Add an audio recording—ambient sounds, melodies, or late-night thoughts—along with your written message. [ Intuitive Map Pinning: Send Anywhere in the World ] - Drop a Pin to Send: Want to send a postcard to Paris, a quiet alley in Tokyo, or a remote coastline? Tap directly on the map to place your dandelion seed anywhere you dream. - Sensory Exploration Mode: For deeper tactile interaction, breathe into your microphone or use the compass to simulate wind trajectories whenever you wish. [ Map Journey & Distant Discovery ] - World Travel Logs: Watch seeds travel thousands of kilometers with tracked mileage and journey stamps from travelers worldwide. - 10km Pickup Radius: Unlock and pick up seeds landing near your real-world coordinates to reveal their artwork, photos, and voice notes. - Re-blow & Signatures: Add your signature and heartfelt reply, sending the seed forward to its next destination. [ Telescope Space Cruise Mode ] - Arc Carousel Browsing: Browse through nearby seeds smoothly with our spatial dynamic arc carousel. - Synchronized Map Focus: Seamless camera tracking guides your view directly to each seed's coordinates as you browse. [ End-to-End Encrypted Slow Conversations ] - Private Encrypted Chat: Connect directly with seed creators through secure E2EE architecture. - Mindful, Safe Haven: An anonymous, pressure-free sanctuary to vent, journal, and reflect. Pick a destination on the map, craft your drawing or photo postcard, and plant your first seed with SkyPost today. -------------------- [Terms of Use & Privacy Policy] • Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy Policy: https://sites.google.com/view/skypost-ios-app/en/privacy-policy
OnceChat
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OnceChat is a quiet messaging app built around a simple idea: just one message a day. Away from endless notifications, constant replies, and the pressure of read receipts — you choose one message each day, carefully, and send it. That's OnceChat. ■ One message a day Just one message per day, taking turns. So every single letter matters. ■ Quietly gone in 24 hours Your words fade after 24 hours. Because nothing is kept, some things become easier to say. ■ No notifications No push notifications, ever. Open the app when you want to, at your own pace. A quiet place that never rushes you. ■ Today's letter Share one short public letter a day with all your friends. Send yours, and you can read theirs too — a new, reciprocal way to stay connected. ■ Thoughtfully secure No passwords — sign in with a passkey (biometrics). Messages are encrypted. No ads, and no third-party tracking. A calm space, like the quiet before dawn. Send your one letter today, with OnceChat.
Screenshots
Verdict
The clearest difference is in-app purchases: OnceChat at none against SkyPost's 2. OnceChat also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support 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
Both are free to download. SkyPost sells 2 in-app purchases, starting at $1.99 per month. OnceChat asks for nothing beyond the download.
SkyPost ships an update every 8 days, OnceChat every 2 weeks. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.
| Parameter | SkyPost | OnceChat |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 21 MB | 37 MB |
| Age rating | 12+ | 4+ |
| Developer | Jong Min Deng | Kosei Takanashi |
In-app purchases
SkyPost
- Monthly$1.991 Month
- Annual$4.991 Year
OnceChat
No in-app purchases









