SBC vs Kdisk
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SBC
This app calculates precise ballistic data for long-range shooting, assisting shooters with holdovers and scope settings. It supports various units and reticle types, and is available on iPhone, iPad, and Apple Watch.
- Accurate ballistic calculations
- Imperial and Metric units
- Elevation adjustments (Mil-MRAD, MOA, click)
- Range cards and bullet lists
- Reticle support (FFP, SFP)
- Coriolis correction
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#1st ballistics App for Apple Watch. External Ballistic Calculator is aimed towards recreational long range shooters. Works with large caliber and airguns. It helps shooters calculate hold overs, and scope settings necessary for long range shots. Available for iPhone, iPad and Apple Watch. Features: - Accurate calculating targeting - Imperial units (grain, in, yard) and Metric units (gram, mm, meter) - Elevation: Mil-MRAD, MOA, click - Range cards - List of bullets - First focal plane and Second focal plane reticles - Rangefinder - Coriolis Correction - Shooting targets - Calculate Spot On Ballistic for Nikon scopes - Ballistic Calculator for Meopta scopes Usage tips - Target Change distance: tap on distance amount or use increase/decrease buttons Smooth increase/decrease distance: iOS: push increase/decrease button and hold WatchOS: double push increase/decrease button - List of Bullets Delete bullet: swipe left - Ballistic Select column: tap on column header Premium: Subscription provides access to all features. • Your subscription will renew automatically each period. You can turn off auto-renewal by going to your Account Settings after purchase. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms of Use: http://gv-apps.com/appsTermsOfUse.html Privacy Policy: http://gv-apps.com/appsPrivacyPolicy.html
Kdisk
Manage and access your media and documents stored on an iStorage device. Browse photos, videos, and music with thumbnail views, and perform file operations like copying, deleting, and renaming. It also supports document viewing for various popular formats.
- Media thumbnail display
- List/thumbnail view
- File sharing
- Copy, cut, delete, rename files
- Local/iStorage data transfer
- Slideshow mode for photos
- Music playback with artwork
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“Kdisk” is an application software for iStorage device. •The main interface displays Media thumbnails :video, photo, music • Supports list / thumbnail view, support sharing operation for photos, music and documents • Support copy/cut/delete/create/rename operation and support local/iStorage data transmission in /between • Support to play the photos by slideshow mode • Support music artwork shows, repeat mode setting, time line drag operation • Document: Support formats of .keynote、.numbers、.page、.xls/.xlsx, .doc/docx、pdf、txt、ppt/pptx
Screenshots
Verdict
The clearest difference is rating: SBC at 4.5 against Kdisk's 1.6. SBC also leads on review sentiment (31% vs 15%) and ratings volume (1.6K vs 112). Kdisk's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement 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. SBC sells 1 in-app purchase, starting at $2.99 per month. Kdisk asks for nothing beyond the download.
SBC holds the better App Store score, 4.5 against 1.6. That said, the two scores are not equally well evidenced: SBC has 1.6K ratings behind it against 112, so its average is the more settled of the two. Written reviews point the same way: 31% of SBC's written reviews are positive against 15% of Kdisk's.
SBC ships an update monthly, Kdisk every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | SBC | Kdisk |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.6K ratings) — better | 1.6 (112 ratings) |
| Positive reviews | 30.8% of reviews — better | 14.6% of reviews |
| Number of ratings | 1.6K — better | 112 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 9.0 | 9.0 |
| Further details — not scored | ||
| Size | 11 MB | 94 MB |
| Age rating | 17+ | 4+ |
| Developer | Vitalii Gryniuk | 振峰 皮 |
Customer experience
SBC
Kdisk
User reviews
SBC
From 1.6K App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Intuitive layout
- 💡 Useful features like GPS and target selection
- 🎯 Accurate ballistic calculations
- 🔍 Extensive ammo and scope library
Room to improve
- 🐛 Constant crashes and app failures
- 🔒 Subscription required to access full functionality
- 🔍 Limited scope and reticle options
- 🔢 Inability to change drag model from G1
- 💾 Loss of saved data when reinstalling app
Kdisk
From 112 App Store ratingsWhat we love
- 👍 Works on iPhone and computer
- 👍 Works for some users
- 👍 Flawless operation for some users
- 👍 Happy with results for some users
Room to improve
- ❌ Does not work with iPhone 15
- ❌ Does not work with iPhone 16 Pro
- ❌ Does not work with iOS 17.2
- ❌ App doesn't recognize card reader
- ❌ Cannot open images/videos
Bugs and requests
SBC
Reported bugs
4 issues- App crashes on startup
- Weather data not updating properly
- Incorrect reticle subtensions
- Issues with data input and saving
Requested features
5 requests- Add G7 drag model support
- Sync data between devices
- Integrate with weather sensors like Kestrel
- Improve Apple Watch app functionality
- Expand scope and reticle database
Kdisk
Reported bugs
14 issues- App doesn't recognize the card reader
- Cannot open images/videos
- Limited file access (only recent 499 photos)
- No pictures show up on the card
- App crashes frequently
Show 9 moreShow fewer
- Connection drops intermittently
- Does not delete pictures accurately
- Lags out during use
- Corrupts SD cards after a few uses
- Preview images are not accurate
- App crashes before loading content
- Device not recognized when plugged in
- Functionality buttons (3 dots) missing
- App doesn't ask for access on iPad
Requested features
10 requests- Fix the issue with dropping connection
- Resolve compatibility issues with newer iPhones (15, 16 Pro)
- Address iOS 17.2 compatibility
- Improve file access limitations
- Ensure accurate deletion of pictures
Show 5 moreShow fewer
- Fix preview image functionality
- Add an 'eject' tab for SD cards
- Resolve issues with SD card corruption
- Ensure app functions correctly in field conditions
- Make the app more user-friendly for transferring files
In-app purchases
SBC
- Premium - Month$2.991 Month
Kdisk
No in-app purchases
