Capsule vs UnderLine
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Capsule
Capture spontaneous moments with friends using a digital disposable camera experience. Create time-sensitive photo capsules that develop over time, revealing shared memories. Focuses on authentic, unfiltered snapshots within a private community.
- Create time-sensitive photo capsules
- Disposable camera-like photo capture
- Surprise photo reveals
- Friends-only sharing feed
- Curate photos into albums
- Authentic, unfiltered photography
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CREATE CAPSULES, CAPTURE MOMENTS Invite your friends to join you on Capsule, where every shared moment is an adventure. Create capsules, set the timer, and let the magic unfold. It's like having a disposable camera in your pocket, ready to capture the essence of the moment. TIME-SENSITIVE MEMORIES Capsules are fleeting, just like the moments they encapsulate. Snap photos with friends, and as the timer ticks down, anticipation builds. Once the capsule closes, the pictures develop, creating a shared memory timeline that's as unique as your friendships. UNVEIL THE SURPRISE Embrace the thrill of the unknown! Your snaps remain a mystery until the capsule unlocks. Reveal the unexpected, reminisce, and relive those spontaneous moments with your friends. Capsule brings the joy of surprise back to photography. FRIENDS ONLY Capsule is more than an app; it's a community. Foster genuine connections with friends, not just virtual followers. Share your photo journey on the Friends Feed, curate your favorite snaps into personalized albums, and watch the week unfold in a visual storytelling experience. CAPTURE THE UNFILTERED YOU Step into the world of Capsule, where authenticity shines. Experience the simplicity of a disposable camera merged with the modern ease of a mobile app. No need for elaborate filters β just real, raw, and unfiltered moments. DOWNLOAD CAPSULE NOW Why wait? Claim your profile, start creating capsules, and invite your friends to join the photographic journey. Capsule is more than an app; it's a celebration of moments that matter. Live in the present, capture the memories, and share the experience with Capsule β because life is too beautiful not to be captured. WHAT ARE YOU WAITING FOR? JOIN CAPSULE TODAY!
UnderLine
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UnderLine is a one-to-one messaging app that lets your conversation partner see your words in real time while you type. Unlike conventional messaging apps, where the other person sees your words only after you tap Send, UnderLine lets the conversation begin from the moment you start typing. When you delete draft text, the change is also reflected on the other person's screen. This makes it possible to share the rhythm of a conversation and the way words take shape, even when you are apart. Key features - Real-time display of text while it is being typed - Simple one-to-one messaging - Add friends using public IDs or QR codes - See in your conversation list when someone is typing - Search your contacts, and your conversation list by name or message - Mute notifications, pin conversations, or hide them from your list - Push notifications for new messages - Blocking, reporting, and in-app account deletion - Encrypted device-to-device transfer using a QR code - Encrypted iCloud backup and restoration Message bodies and live-typing text are end-to-end encrypted. Push notifications never include message content. Important notes - Live typing is visible while the other person has the same conversation open. Because text may be seen before you tap Send, do not type anything you do not want the other person to see. - Enable notifications to receive new-message alerts while the app is in the background or closed. Message content is not shown in notifications.
Screenshots
Verdict
The clearest difference is update cadence: UnderLine at every 3 days against Capsule's every 10 days. Capsule's advantage is iOS requirement (13.4 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Capsule ships an update every 10 days, UnderLine every 3 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | Capsule | UnderLine |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | β |
| Update frequency | Every 10 days | Every 3 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | β |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.4 β better | 15.6 |
| Further details β not scored | ||
| Size | 41 MB | 67 MB |
| Age rating | 12+ | 17+ |
| Developer | Romain Chikirou | 5mm |
In-app purchases
Capsule
No in-app purchases
UnderLine
No in-app purchases









