Comparison

FIFISH vs ISD Link

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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)
Read full description

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

About

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.

Highlights
  • Smart device interaction
  • Local data saving
  • No account registration
  • Bluetooth connectivity
  • Supports numerous device models
Features
Read full description

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

FIFISH4 screens
ISD Link3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

FIFISH ships an update monthly, ISD Link every 3 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

Scorecard1 real difference · 9 level
FIFISH versus ISD Link: the parameters behind the verdict, then further details
ParameterFIFISHISD Link
PriceFreeFree
Rating2.2 (14 ratings) — better2.1 (23 ratings)
Positive reviews6.7% of reviews21.0% of reviews — better
Number of ratings1423 — better
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS13.013.0
Further details — not scored
Size140 MB61 MB
Age rating4+4+
DeveloperShenzhen QiYuan Technology Co. Ltd.深圳艾斯特创新科技有限公司

Customer experience

FIFISH

All ratings14 ratings
Positive28.6%
Neutral0.0%
Negative71.4%
Written reviews15 reviews
Positive6.7%
Neutral20.0%
Negative73.3%

ISD Link

All ratings22 ratings
Positive31.8%
Neutral0.0%
Negative68.2%
Written reviews81 reviews
Positive21.0%
Neutral6.2%
Negative72.8%

In-app purchases

None

FIFISH

No in-app purchases

None

ISD Link

No in-app purchases

Questions

Is FIFISH free?
FIFISH is free to download, with no in-app purchases.
Is ISD Link free?
ISD Link is free to download, with no in-app purchases.
Which has better reviews, FIFISH or ISD Link?
FIFISH is rated higher. FIFISH averages 2.2 out of 5 from 14 ratings, while ISD Link averages 2.1 from 23 ratings.
Do FIFISH or ISD Link have ads?
Neither FIFISH nor ISD Link shows ads.
Which is updated more often, FIFISH or ISD Link?
FIFISH ships an update monthly, and ISD Link every 3 weeks. Most recently, FIFISH was updated on October 10, 2026 and ISD Link on October 12, 2026.

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