Watermelon Backup vs Bonsai Studio by PrismML
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Watermelon Backup
Securely back up your iPhone photo library to your own storage, not a third-party cloud. Organize and manage your photos by month, with options to back up, download, or sync. It intelligently avoids unnecessary transfers and can access iCloud Photos when needed.
- Backup iPhone photos to personal storage
- Supports NAS, SFTP, S3, WebDAV, SMB
- Organize backups by month
- Intelligent transfer to avoid duplicates
- Pause and resume backup tasks
- Restore photos and videos from backup
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Back up your iPhone photo library to computers on the same local network, external drives, SMB, WebDAV, SFTP, S3, OneDrive, Dropbox, or Google Drive. Drop Mode also sends photos, videos, and files directly. Nothing passes through Watermelon Backup’s servers. • BACK UP TO A COMPUTER OR EXTERNAL DRIVES Back up directly to a computer on the same local network without installing a desktop app. Open link.watermelonbackup.com in Chrome or Edge, choose a backup folder, then scan the QR code with Watermelon Backup. Keep both devices on the same local network. You can also back up directly to external drives connected to your iPhone. • DROP PHOTOS, VIDEOS, AND FILES Drop Mode sends selected items directly to a computer or storage destination’s Inbox without backup records. Choose original or edited versions, Live Photo MOV videos, or location removal; Photos stays unchanged. It does not deduplicate, so sending an item again keeps another copy. Free users can send up to 3 items at a time; Pro has no per-send limit. • NETWORK AND CLOUD DESTINATIONS Connect to a NAS or server using SMB, WebDAV, or SFTP, or use S3-compatible storage. For OneDrive, sign in with a personal Microsoft account; work or school accounts and SharePoint are not supported. OneDrive backups stay in the app folder. Dropbox backups are stored in Dropbox/Apps/Watermelon, and Watermelon cannot access your other Dropbox files. For Google Drive, provide your own OAuth client ID. Watermelon uses its own folder in My Drive and only requests access to files created by this OAuth app. • BROWSE AND MANAGE MEDIA The built-in media browser covers your full library and selected albums. In the full-library browser, switch among Local, All, and Remote to explore your on-device library, a connected backup, or a combined view. See whether each item is on your device, in the backup, or both. Browse photos, videos, and Live Photos with full-screen previews, then select one or more items to upload, restore, share, or delete from the device or backup. • BACKGROUND AUTO-BACKUP — PRO With Pro, automatically upload the current and previous calendar months to saved SMB, WebDAV, SFTP, S3, OneDrive, Dropbox, or Google Drive destinations while your iPhone is charging and online. Configure a minimum interval and Wi-Fi/cellular use for each destination; iOS decides the actual timing. Backup to Computer sessions and external drives are not supported in the background. • PICTURE-IN-PICTURE PROGRESS — PRO View live transfer status and logs in a floating Picture-in-Picture window for Upload, Download, or Complete tasks while the app is in the background. Pro offers monthly and yearly subscriptions or lifetime access. Lifetime owners keep Pro. • BACK UP, DOWNLOAD, OR COMPLETE BY MONTH The Home screen places your iPhone library and backup destination side by side, organized by month. Choose one or more months to back up, download, or complete. Complete first backs up local items missing from the destination, then restores remote-only items to Photos; it does not synchronize deletions. Existing content is recognized to avoid unnecessary transfers, and active tasks can be paused and resumed. • PRESERVE ORIGINALS AND RESTORE Photo and video resources are transferred without recompression. Backups of edited media include the edited version, the unedited original, and adjustment data. Live Photos are stored as a still image and paired video, then rebuilt when restored to Photos. Optional iCloud Photos access can fetch iCloud-only originals when needed; when disabled, only on-device resources are processed. • BUILT-IN TOOL The Duplicates tool finds content-identical items in your local photo library so you can review what to keep before removing selected copies. • OPEN AND REVIEWABLE The source code is open for review, and credentials for saved destinations are stored in the iOS Keychain. --------------- End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Bonsai Studio by PrismML
Create high-quality images directly on your iPhone without an internet connection. This app uses advanced AI models that run locally, ensuring your prompts and creations remain private on your device. Experience fast, on-device image generation for everyday creative workflows.
- On-device image generation
- Offline functionality
- Multiple resolutions and aspect ratios
- Save images to Photo Library
- Built-in prompt moderation
- Open weights license
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Bonsai Studio brings high-quality image generation to iPhone, running locally on your device instead of relying on cloud servers. No internet connection is required, and your prompts and generated images stay on your device. Powered by PrismML’s ternary Bonsai Image model, Bonsai Studio makes advanced diffusion image generation practical on mobile hardware. On iPhone 17 Pro, it can generate a 512×512 image in roughly 12 seconds, making local creative workflows fast enough for everyday use. KEY FEATURES • On-device image generation • Multiple resolutions and aspect ratios • Save generated images directly to your Photo Library • Built-in prompt moderation • Open weights under the Apache 2.0 license REQUIREMENTS Bonsai Studio uses on-device compute and memory. For the best experience, iPhone 15 Pro or newer with 8 GB or more unified memory is recommended. ABOUT PRISMML PrismML builds ultra-dense intelligence designed to push the limits of speed, memory efficiency, and on-device AI.
Screenshots
Verdict
The clearest difference is in-app purchases: Bonsai Studio by PrismML at none against Watermelon Backup's 1. Bonsai Studio by PrismML also leads on rating (5.0 vs 4.5). Watermelon Backup's advantage is review sentiment (97% vs 75%). On price, ratings volume, update cadence and ads 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. Watermelon Backup sells 1 one-off in-app purchase. Bonsai Studio by PrismML asks for nothing beyond the download.
Bonsai Studio by PrismML holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 13 and 7 respectively. Written reviews complicate that: 97% of Watermelon Backup's written reviews are positive against 75% of Bonsai Studio by PrismML's, so the app with the better star average is not the one people write more warmly about.
Both ship on a similar rhythm, roughly every 2 days. Both last shipped on October 31, 2026.
| Parameter | Watermelon Backup | Bonsai Studio by PrismML |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (13 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 96.7% of reviews — better | 75.0% of reviews |
| Number of ratings | 13 — better | 7 |
| Update frequency | Every 2 days | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 42 MB | 100 MB |
| Age rating | 4+ | 12+ |
| Developer | ZIZICICI LIMITED | Prism ML |
Customer experience
Watermelon Backup
Bonsai Studio by PrismML
In-app purchases
Watermelon Backup
- Watermelon Pro$9.99
Bonsai Studio by PrismML
No in-app purchases
Questions
Is Watermelon Backup free?
Is Bonsai Studio by PrismML free?
Which has better reviews, Watermelon Backup or Bonsai Studio by PrismML?
Do Watermelon Backup or Bonsai Studio by PrismML have ads?
Which is updated more often, Watermelon Backup or Bonsai Studio by PrismML?
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