via vs Battery Duo
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
via
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You wish to make on-site changes to your viasis or viacount II device? Or you wish to read your measured data and make evaluations locally? No problem! Simply install the via app on your iPhone and connect via Bluetooth. All settings can be easily executed and transferred to the devices.
Battery Duo
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Battery Duo shows the battery of your Apple Watch and your iPhone at the same time on the watch face β one glance at your wrist is enough. 3 IN 1 β SAVES SPACE The outer ring shows the iPhone's battery, the inner ring the watch's, and the middle shows weekday and date. Three pieces of information in just one complication β so the other slots on your watch face stay free for what else matters to you. THIS IS HOW IT LOOKS β’ Double ring with date: iPhone outside, watch inside (or the other way around), weekday and date in the middle β’ Numbers with symbol, numbers only, rings or bars β you choose β’ Colored by level: green, yellow, red β limits freely adjustable β’ Lightning bolt while charging, gray display when a value is outdated ALWAYS UP TO DATE β’ The watch regularly fetches the iPhone's battery level in the background β’ Turbo update: a ready-made Shortcut and a few automations send the value each time you use your iPhone, charge it, or the battery drops below a 5% step NOTIFICATIONS β’ Watch or iPhone fully charged β time to unplug β’ Low battery β time to charge β’ Watch battery as a number on the iPhone app icon EASY TO SET UP β’ All settings on iPhone and watch β changes apply immediately on both β’ Complication for round, rectangular and corner slots as well as the text line UNLOCKING Yearly subscription: 3 days free, then β¬9.99 per year, renews automatically, cancel anytime. Or a one-time purchase of β¬29.99 for good, no subscription. Both unlock all features: iPhone battery on the watch and in the complication, notifications when full and nearly empty, battery number on the app icon, Turbo update. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://bertramplischke.github.io/batterie-duo/datenschutz.html Note: iOS reports battery levels to apps in 5% steps; small differences from the status bar are normal. Made with love in BrΓ€unrode.
Screenshots
Verdict
The clearest difference is in-app purchases: via at none against Battery Duo's 2. Battery Duo's advantage is update cadence (daily vs weekly). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Battery Duo sells 2 in-app purchases, starting at $8.99 per year. via asks for nothing beyond the download.
via ships an update weekly, Battery Duo daily. The most recent releases landed on November 4, 2026 and November 10, 2026 respectively.
| Parameter | via | Battery Duo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Daily β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 17.6 | 17.0 β better |
| Further details β not scored | ||
| Size | 85 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | via traffic controlling gmbh | Bertram Gotz Plischke |
In-app purchases
via
No in-app purchases
Battery Duo
- Jahresabo3 Days trial$8.991 Year
- Einmal kaufen$24.99









