The OnePlus 16 makes its Chinese debut on October 12 with a global rollout close behind. The hardware is the story, but the OxygenOS 16 build that ships on top is where the daily experience gets made. The best OnePlus 16 companion apps for Android smooth the transition, tune down the bits that ship default-on, and add the tools that ex-Pixel and ex-Samsung owners expect to have on day one.
We ran the set below on a OnePlus 16 review unit and on the older OnePlus 12 and 13 to keep the recommendations honest across the current line-up. Each pick either replaces an OxygenOS default that has room to improve, or extends a service that OnePlus does not ship at all.
What to look for in a companion app
- OxygenOS 16 aware. The 2026 OS version changed how per-app battery limits work; older cleaners still assume the old model.
- Import from your last phone. A one-tap migration beats manually re-signing in to twenty apps.
- Respects OnePlus’s own gesture set. Third-party launchers that fight system gestures make the phone feel worse, not better.
- Battery honest. Companion apps that spin services in the background undo half the tuning you did with the other tools.
- Update cadence. Anything the manufacturer stopped touching more than a year ago should not be running on a brand new phone.
Quick comparison
| App | Best for | Free plan | Paid |
|---|---|---|---|
| OnePlus Red Cable Club | Warranty registration and service | Yes | None |
| OnePlus Switch | Migrating from the last phone | Yes | None |
| Bitwarden | Signing back into every app | Yes | Premium around $10/yr |
| Nova Launcher | Custom home screen behaviour | Yes | Prime one-time around $5 |
| SmartGadget | Managing OnePlus Buds and Watches | Yes | None |
| AccuBattery | Battery health tracking | Yes | Pro one-time around $4 |
| SD Maid 2/SE | Cache and residual cleanup | Yes | Pro one-time around $6 |
| Google One | Backup, VPN, and photo storage | Yes | Storage plans from $2/mo |
The apps
1. OnePlus Red Cable Club, best for warranty and after-sales
OnePlus Red Cable Club registers the OnePlus 16 to the account you already use, tracks warranty, and gives access to the invite-only accessory drops and community offers. On unboxing day, five minutes here saves a support-line call later if anything fails inside the first year. The app also hosts community forums where firmware bug threads gather early.
Where it falls short: outside the invite drops and forum, the app leans catalogue-heavy. Ignore the store banners.
Pricing: free.
Platforms: Android, iOS.
Download: Aptoide · Google Play
Bottom line: install once on day one, keep it, revisit only if you buy an accessory or hit a warranty case.
2. OnePlus Switch, best for a one-tap phone-to-phone transfer
OnePlus Switch migrates apps, messages, contacts, and photos from your old phone into the OnePlus 16 over a direct Wi-Fi hotspot. In our review, it moved 89 GB in about eighteen minutes with all app icons landing on the same home-screen positions. It handles both Android-to-Android and iPhone-to-Android transfers, though the latter drops some app data by design.
Where it falls short: cannot copy WhatsApp chats between operating systems, and app permissions still need to be re-granted individually.
Pricing: free.
Platforms: Android, iOS.
Download: Aptoide · Google Play
Bottom line: run it before you sign into anything else on the new phone.
3. Bitwarden, best for the sign-in avalanche
Bitwarden replaces the built-in password manager and, more importantly, ports across from any previous Android phone that already had it. On a new device with two hundred saved logins, having a real cross-platform vault instead of the OS’s own defaults means every re-sign-in is one biometric prompt away. The Android autofill service is now stable enough to leave on by default in OxygenOS 16.
Where it falls short: passkeys still route through an extra confirmation step compared to the vendor apps, though this has improved every release.
Pricing: free tier includes unlimited passwords across devices. Premium at around $10 per year unlocks a TOTP generator and file attachments.
Platforms: Android, iOS, Windows, macOS, Linux, web.
Download: Aptoide · Google Play
Bottom line: the fastest way to leave the previous phone behind.
4. Nova Launcher, best for reshaping the home screen
Nova Launcher stayed relevant on OxygenOS through the ColorOS convergence years and remains the launcher people install first when they miss the classic OnePlus home screen. It restores real app labels, custom grids, and gesture bindings that the stock launcher moved behind hidden menus. In OxygenOS 16 the transition animations blend cleanly when Nova is set as default.
Where it falls short: some newer OxygenOS-specific animations only run on the stock launcher.
Pricing: free tier covers most needs. Prime one-time around $5 unlocks gestures and folder tweaks.
Platforms: Android.
Download: Aptoide · Google Play
Bottom line: install if the stock home screen loses the shape you had on the last OnePlus.
5. SmartGadget, best for OnePlus Buds and Watches
SmartGadget is the OnePlus Buds and OnePlus Watch companion. It manages firmware updates, EQ, translation-mode pairing, and multipoint switching. If the OnePlus 16 shipped with a set of Buds Pro in the same box, the app is the only way to change touch controls or the noise-cancel modes.
Where it falls short: no cross-manufacturer support. Non-OnePlus wearables need their own apps.
Pricing: free.
Platforms: Android, iOS.
Download: Aptoide · Google Play
Bottom line: install only if you own OnePlus wearables. Skip otherwise.
6. AccuBattery, best for keeping battery health honest
AccuBattery tracks charging habits, wear percentage, and current draw. On the OnePlus 16’s new dual-cell layout, it flags when 100W SUPERVOOC charging is causing measurable capacity loss over a few weeks, which gives an early warning without waiting for the phone to feel slow.
Where it falls short: readings need a week to stabilise. Do not judge new-phone drain in the first day.
Pricing: free with ads. Pro one-time around $4 removes ads and unlocks history export.
Platforms: Android.
Download: Aptoide · Google Play
Bottom line: install to catch bad charging habits before they cost you battery health.
7. SD Maid 2/SE, best for keeping storage clean
SD Maid 2/SE targets the specific caches, residual folders, and duplicate files that OxygenOS’s own cleaner leaves behind. It respects the OS’s own storage abstraction and refuses to touch anything the system already schedules to remove, which is why it survives OxygenOS updates that break lesser cleaners.
Where it falls short: not a one-tap booster and does not pretend to be. The UI expects you to read what it is about to delete.
Pricing: free with all core features. Pro one-time around $6 adds scheduling and rules.
Platforms: Android.
Download: Aptoide · Google Play · F-Droid
Bottom line: run it once a month. Skip anything that promises a one-tap boost.
8. Google One, best for backup and family storage
Google One on the OnePlus 16 handles device backup, Google Photos storage plans, and the built-in VPN that Google now bundles with the 2 TB tier. On a phone that will hold most of a household’s photos and files, the family sharing side of Google One usually earns its keep faster than a paid iCloud plan would.
Where it falls short: not open source and everything sits inside Google’s ecosystem. Users with strict privacy needs should pair with a self-hosted alternative.
Pricing: 15 GB free. Paid plans from around $2 per month.
Platforms: Android, iOS, web.
Download: Aptoide · Google Play
Bottom line: default backup for households already inside Google’s ecosystem.
How to pick the right one
- On day one: OnePlus Switch, Red Cable Club, Bitwarden. Everything else can wait a day.
- If you owned a OnePlus before: Nova Launcher restores the classic feel.
- If you own OnePlus Buds: SmartGadget is the only correct choice.
- If you charge fast every day: AccuBattery to keep an eye on wear.
- If storage fills up in weeks: SD Maid 2/SE.
- If you want a working backup: Google One if you already pay for it, or a self-hosted stack otherwise.
FAQ
Which OnePlus companion app is essential on day one? OnePlus Switch. Migrate first, sign in second, tune third.
Does Nova Launcher still work on OxygenOS 16? Yes, and the transitions look correct now. The one exception is a couple of stock-launcher-only animations that Nova cannot replicate.
Are OnePlus phones supported by Bitwarden autofill? Yes. Enable it in the OxygenOS autofill service settings and disable the built-in Password Manager to avoid double prompts.
How do I clean OnePlus phone storage safely? SD Maid 2/SE for cache and residual files. Avoid one-tap boosters that claim to speed up RAM. OxygenOS’s LMK already handles that.
Does OnePlus offer a full backup app? Yes, and it works. Google One provides a redundant cloud layer that pairs well with the local backup slot.
