# Wavelength — an independent iPhone and iPad client for Doppler

**URL:** <https://community.doppler.com/t/wavelength-an-independent-iphone-and-ipad-client-for-doppler/2000>\
**Category:** Show & Tell\
**Created:** [August 20, 2026, 2:13pm UTC](https://community.doppler.com/t/wavelength-an-independent-iphone-and-ipad-client-for-doppler/2000 "2026-08-20T14:13:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![hteske](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@hteske](https://community.doppler.com/u/hteske)\
**Post date:** [August 20, 2026, 2:13pm UTC](https://community.doppler.com/t/wavelength-an-independent-iphone-and-ipad-client-for-doppler/2000/1 "2026-08-20T14:13:11Z")

</div>

I’ve been a Doppler customer for a while, and the one thing I kept running into  
was checking a value from my phone (or tablet). There’s no official mobile app, and the  
dashboard is built for a mouse — on a touchscreen it turns into pinch-zooming a  
dense table and switching tabs whenever two things need comparing. So I built  
the handful of things I do daily as one-tap actions, and it’s now on the App  
Store as Wavelength.

What it does:

- Browse projects, environments and configs, reveal and copy secret values
- Compare two configs side by side and copy a value across without leaving the  
screen — split view on iPad
- Export several projects into a single encrypted file (a standard age file  
with a passphrase, so `age -d` opens it anywhere)
- Show, in a branch config, whether each secret is inherited, overridden or  
local — with promote-to-root and restore-inheritance as single actions

How it’s built, since this is a secrets forum and the question is fair:

- No backend of mine. The device calls [api.doppler.com/v3](http://api.doppler.com/v3) directly.
- No secret values written to the device. They’re fetched when a screen needs  
them and held in memory only.
- The only thing persisted is the token, in the iOS Keychain with  
WHEN\_UNLOCKED\_THIS\_DEVICE\_ONLY — not in iCloud, not in device backups.
- Face ID on launch and on every return from the background.
- No analytics or tracking SDKs.
- It reads what the provided token is allowed to do and hides actions it can’t  
perform, so a read-only service account token gives a coherent read-only app.

That last one is the setup I’d actually recommend to anyone trying it: a service  
account token scoped to the projects you want on your phone, read-only. It’s a  
pattern I think is underused and it makes “secrets on a phone” a much smaller  
question.

One thing I ran into building it, in case it’s useful to someone else here:  
setting a branch secret’s value to null through the API doesn’t restore  
inheritance the way I expected — the key ends up suppressed in that config  
rather than tracking root again. Converge is what actually undoes an override.  
Took me a while to work out, so it’s now a single button in the app.

Free to browse and read; editing, the config comparison and the encrypted export  
are a one-time unlock, no subscription. Not affiliated with Doppler — just a  
customer who wanted this to exist.

> **[Wavelength — Doppler secrets manager for iPhone and iPad](https://heey.global/wavelength)**
>
> An independent iOS client for Doppler. Browse projects, environments and configs, view and edit secrets, with Face ID and no backend. Free on the App Store.

Happy to hear what’s missing, and if anything about how I’ve used the Doppler  
name is a problem, tell me and I’ll change it.