# ISD Link — user reviews > 81 indexed App Store user reviews of ISD Link by SHENZHEN ISD TECHNOLOGY CO.,LTD, rated 2.09/5 from 23 ratings. - Source: https://appshunter.io/ios/app/isd-link/id1568620244/reviews - App overview in markdown: https://appshunter.io/ios/app/isd-link/id1568620244.md - Rating breakdown: 5★ 4 · 4★ 3 · 3★ 0 · 2★ 0 · 1★ 15 ## Newest reviews (16 of 81) ### 2/5 — Poor connectivity *2025-07-04, version 1.8.1* App loads and connects on latest iOS iPhone/ipad but the live data does not update when charging ### 2/5 — Potentially dangerous *2025-05-27, version 1.8.1* Using the 608PD charger to charge a 12V Lead acid battery with a custom charging task at 6S it inputs 21V. When you use the preset tasks it gives 15V which is what you would expect. This is potentially dangerous if it happens with other battery chemistries and will damage your batteries. Please fix. This was a bug that happened to me once though once is enough to burn your house down. Always look at what the charger is doing. ### 4/5 — Add ability to give names to PB40 power banks *2024-08-06* Works for me to manage my PB40 power banks, but it’s challenging to see which device is selected as they all have the same name in the list (PB40) ### 1/5 — Unbrauchbar *2024-08-01, version 1.7.1* Die App konnte das Gerät(PB50DW) nicht finden. ### 1/5 — Updated the app *2024-07-07, version 1.6.4* I bought an ISDT NP2Air device, installed the application, liked everything, everything was fine until the update came out, now there are constant errors, the device restarts, does not show information about the battery. Please fix it ### 1/5 — Immediately crashes *2024-07-06, version 1.6.4* It crashes when i open the app. I can’t use my brand new NP2 Air. Please fix. ### 1/5 — Was working fine now crashes on start *2024-06-28, version 1.6.4* Previously liked this app but now won’t open and crashes on start. ### 1/5 — Current version just crashes *2024-06-21, version 1.6.4* I generally have had no issues with the app until the latest update. Now it crashes almost immediately after startup. Now I can’t see the status of batteries in my NP2 Air….my 200x….I’m flying blind with all of my ISDT devices. ### 2/5 — Sehr dürftige Ausstattung *2024-06-21, version 1.6.4* Lediglich die Anzeige des momentanen Status sowie das Ausschalten des Ladevorgangs ist möglich. Alles in allem eine sehr magere Ausstattung. ### 1/5 — 最低 *2024-06-15, version 1.6.3* c4air 製品側の問題でしょうか 最初はスマホへ接続できて、充電設定なども可能ですが、そのまま接続を続けていると右上のインジケータがぐるぐる周りっぱなしになり、アプリを再起動しても端末へ接続できなくなります その後、製品側の通電音がして、全くオフラインになってしまい、もう一度通電音がして充電されなくなります 最悪の製品でした ### 2/5 — Translation could be better. *2024-06-07* Please add over discharge protection for PB40 battery, I.e. don’t allow discharging below 5% ### 1/5 — Can’t use the app *2024-06-05* The app closes as soon as I turn on the Bluetooth. Can’t make It work. ### 1/5 — 持續閃退 *2024-05-24, version 1.6.0* Ios17.5.1 ### 1/5 — Crash instantly *2024-05-18, version 1.6.0* App is useless ### 1/5 — App stürzt ab *2024-05-03, version 1.5.2* Seit dem letzten App Update kein Zugriff mehr. Es wird geladen aber die App schließt sich immer wieder sofort, sodass keine Einstellungen vorgenommen werden können. Bitte fixen!!! ### 2/5 — No battery connct problem *2024-04-17, version 1.5.0* Hata alıyorum şarj edemiyorum ## Most critical reviews (10 lowest-rated) ### 1/5 — 点开zip后会闪退 *2026-02-27, version 1.8.3* 请看看到底是什么原因 ### 1/5 — Nutzlose APP *2025-11-04, version 1.8.3* Ich sehe nur die Daten wie auf dem Display. Keine Einstellungen sichtbar, kein Update Fenster nichts. Absolut wertlos ### 1/5 — A8air not linking to anymore *2025-11-01, version 1.8.3* No longer shows my 4 A8 Air chargers in the app, can’t get them to link at all? What the fix here ### 1/5 — Firmware fails to update *2025-05-02, version 1.8.1* Basically have an A8 Air charger and every time I connect to it the firmware update pop up requests to update… I try, it cycles for minutes through thr update only to remain showing the original firmware. Pointless if it can’t actually update its own firmware. Loops spiral into always doing the same thing. Ghastly engineering. ### 1/5 — Failed firmware update *2025-04-30, version 1.8.1* The firmware update just kept looping itself and never truly finish. It has bricked the device. ### 1/5 — C’est une véritable escroquerie, ne marche ni avec iphone ni avec iwatch. *2025-04-18, version 1.8.1* C’est une véritable escroquerie, ne marche ni avec iphone ni avec iwatch, c’est pour cela que que le matériel associé à ce logiciel est bradé sur les sites Internet. ### 1/5 — STILL NO NOTIFICATIONS OF CHARGE COMPLETE ! *2025-04-13, version 1.8.1* UPDATE 26MAR2025: STILL NO NOTIFICATIONS WHEN CHARGING COMPLETE. OVER A YEAR THIS HAS BEEN HAPPENING. UPDATE 30/6/23: The recent update DID NOT fix the issue of not getting an alert when charging complete. You said this new update would fix this issue but it didn’t. The only way I get an alert is if I first open the app up and check the status of charging. I shouldn’t need to have the app open to get alerts. Before the last two updates it worked, now it doesn’t. I have 4 of these chargers, and if this is not fixed in the next couple of weeks, I will return them back to Amazon for refund. UPDATE 22/6/23: After the recent update I no longer get notifications that a battery has completed charging. As soon as I open the app I get the notification. I should still get a notification when I’m out of the app, but I don’t. It worked yesterday, but you’ve broken it with the new update !!! Bought an Air A4 today and found some bugs. 1) The notification you get when a cell is finished charging, the cell slot is wrong. So, when it says “CH2: Fast charges done” it means Channel 3 !!. CH1 is CH4, CH2 is CH3, CH3 is CH2 and CH4 is CH1. It’s completely round the wrong way. 2) A lot of the time when I change the parameters they don’t change and I have to reapply them again and again. For example, I tried to change the Charge Current to 1A and it stayed at 0.3A, I did this twice and it stayed at 0.3A. I had to do it 3 times before it would change. 3) The charge rate (mA) is very inaccurate, I charged an AA up, the display said it was charging at 500mA yet it took nearly 3 hours to put 1A into it. This means the true figure was 333mA, not the reported 500mA. If these bugs were ironed out then these would be great little chargers. ### 1/5 — Does Not Work with N8 *2025-03-25, version 1.7.2* Doesnt work for N8 ### 1/5 — Doesn’t work *2025-03-23, version 1.7.2* With the actuall IOS the App didn’t find any Charger ### 1/5 — Only a monitor *2025-03-19, version 1.7.2* For the K2Zip charger this app can only monitor the battery parameters and that’s it. There is no functionality like the ability to start and stop the charge or discharge cycles. ## Most praised reviews (10 highest-rated) ### 5/5 — Works as expected *2024-07-26, version 1.7.1* I particularly appreciate the opportunity to log charging data to .csv file and email it to myself. Nice feature. ### 5/5 — Actually works really well *2024-05-30, version 1.6.0* It connected effortlessly to my new charger with no details required and is really fast to connect. What more could you ask for ### 5/5 — ok *2024-04-18, version 1.5.2* not bad ### 5/5 — Happy *2024-04-17, version 1.5.2* Ich habe endlich ein Ladegerät C4 Air inkl. Bluetooth Software für Alle Akkus gefunden. Gekauft über Amazon. Bei mir funktioniert Alles wie erwartet. VG aus Bayern. ### 5/5 — hat 3 Funktionen *2023-12-25, version 1.4.6* und die funktionieren 😀 ### 5/5 — neu bei 608 PD *2023-12-14, version 1.4.6* volle Kontrolle über Spannung, Zellen Anzahl und Typ starten stoppen wenn jetzt noch DC kommt 100% ... endlich nutzvolle oberfläche. super währe noch start spannung und ladung in mAh und zum speichern ... damit sind dann Bewertungen der accus simplel möglich. ### 5/5 — Shows detailed stats on each battery *2023-12-04, version 1.4.6* I like it, can I ask to add an option to disable С4 Air booting sound? App allows to disable the sound when a battery is charged, but when the charger is plugged in it still runs very loud annoying sound. Thank you! ### 5/5 — Amazing App *2023-10-16, version 1.4.3* Superb app. I gather from the reviews a few people have had issues with this app but I think the recent updates must have fixed these because it works perfectly now. One of the killer features I think people may have missed is the ability to charge the new Lithium 1.5v batteries. A rare feature. ### 5/5 — Works well with 200 series charger docks *2023-05-26* The app shows which ports are active (animations of wires being plugged in) and wattage consumption as well as a doughnut graph of the total max available wattage (a 50w would be a quarter turn). Nifty to some extent. ### 5/5 — Tut was es verspricht - Firmware-Update problemlos *2023-03-17, version 1.2.10* Recht praktisch, den Ladevorgang zu beobachten und ggf. auf zu zeichnen. Ladegeschwindigkeit kann überprüft werden. In jedem Fall besser als keine App - daher zufrieden… --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-22.*