FIFISH vs ISD Link
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FIFISH
Explore the underwater world with an OMNI-directional drone. Its advanced thrusters allow for 3D movement and 360° rotation, capturing stunning 4K footage with cinematic clarity. Enhance your underwater videos with intelligent color correction and low-light capabilities.
- OMNI-directional movement
- 360° rotation (roll, pan, tilt)
- 4K UHD / 30 FPS video recording
- 1080P / 120 FPS option
- 166° FOV adaptable lens
- Auto color-enhancing algorithms
- Low-light performance (f/2.5 aperture, ISO 100-6400)
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Meet FIFISH V6, the world's 1st OMNI-directional underwater drone that gives you the full freedom to drive in any direction. Powered with 6 patented thrusters, the V6 empowers you to explore the vast underwater world without limits. FIFISH V6’s smart vector thrusters deliver astonishing 3-dimensional freedom. It can rotate 360° degrees in rolling, panning and tilting. Equipped with Ambarella chipset, FIIFISH V6 shots at 30 frames-per-second, delivering the greatest cinematic clarity for underwater drones. The H.265 codec offers advanced compression in your 4K footage, resulting in higher storage efficiency with greater detail. Available for 4K UHD / 30 FPS or 1080P /120 FPS. The stunning 166° FOV adaptable lens display lets you fully experience a human’s natural vision undersea and connects seamlessly with the ocean life and ecosystems. The camera system’s auto color-enhancing algorithms and manual settings bring out the vibrant colors of ocean landscapes. The f/2.5 aperture and wide ISO range 100-6400 deliver remarkable images in low light conditions below the surface. Exciting and once-in-a-lifetime moments can pass by in an instant. FIFISH V6 will avoid blurry shots and ghosting footage even in the strongest currents, capture your most important underwater stories. Make your underwater moments epic by enhancing the feeling and mood of your footage. Whether highlighting the ocean depths or capturing the vibrancy of tropical coral reefs, it makes your videos truly memorable. -1080P real time images -Real time transmission of depth & direction data -Real time transmission of camera parameters -One button control for shooting, recording & saving photos or videos -Adjustable focus and macro mode -Replay recording photos or videos at any time -Download original 4K video with high resolution
ISD Link
This app allows interaction with various smart devices. It prioritizes user privacy by saving all data locally and not collecting personal information. Bluetooth is required for device scanning and connection.
- Smart device interaction
- Local data saving
- No account registration
- Bluetooth connectivity
- Supports numerous device models
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ISD Link is an APP specially designed for smart device interaction. 1. ISD Link does not have an account registration function, and all data on the device is saved locally and will not be uploaded to remote servers. It promises not to collect user information. 2. During use of ISD Link, Bluetooth needs to be turned on for device scanning and connection. 3.ISD Link supports the following devices: TESTV co-branded model PB25DW, TESTV co-branded model PB40, MAG20, PB70W, PB40, PB50DW, PB10DW, PB25DW, ZIP, Power200 series, EDGE, NP2GO, 608PD, A8Air, A4Air, Air8, C4Air, B80 /B60, K4, X16, K2Air, NP2Air, LP2Air.
Screenshots
Verdict
FIFISH and ISD Link both sit at 2.2 stars, but that hides the real split: 21% of ISD Link's written reviews are positive against 7% of FIFISH's. On price, rating, ratings volume and update cadence 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 2.2 for FIFISH against 2.1 for ISD Link. Both are backed by a comparable volume of ratings — 14 and 23 respectively. Written reviews are what separate them: 7% of FIFISH's written reviews are positive against 21% of ISD Link's.
FIFISH ships an update monthly, ISD Link every 3 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.
| Parameter | FIFISH | ISD Link |
|---|---|---|
| Price | Free | Free |
| Rating | 2.2 (14 ratings) — better | 2.1 (23 ratings) |
| Positive reviews | 6.7% of reviews | 21.0% of reviews — better |
| Number of ratings | 14 | 23 — better |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 140 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen QiYuan Technology Co. Ltd. | 深圳艾斯特创新科技有限公司 |
Customer experience
FIFISH
ISD Link
In-app purchases
FIFISH
No in-app purchases
ISD Link
No in-app purchases









