Stardate vs Battery Train
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stardate
Record and transcribe voice notes instantly from your Apple Watch or iPhone. Enjoy complete privacy with 100% local processing and offline functionality. Access your audio and text files easily via iCloud Drive.
- One-tap voice note transcription
- Offline functionality
- 100% local processing
- Unlimited recording length
- iCloud Drive integration
- Searchable notes
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* Transcribe super fast voice notes from Apple Watch or iPhone with one tap. * Works offline. No servers involved. * Transcription is 100% local to your device. Keep your notes private! * No forced limits on recording length or number of recordings. * Copy all or some of your entries straight from the search bar. * Audio and text files are saved to iCloud Drive for easy access from Finder.
Battery Train
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Are you managing your battery the right way? Smartphone batteries inevitably degrade with use. However, it's hard to tell exactly when it started getting worse, or if its current condition is normal. Battery Train automatically records every single moment of charging and discharging, allowing you to understand your battery status at a glance. [Key Features] ▸ Automatic Battery Logging The app automatically logs your battery status every 5 minutes in the background. Your history builds up continuously without even having to open the app. ▸ History Graphs Check your charging and discharging curves with 24-hour, 7-day, and 30-day graphs. You can see at a glance exactly when your battery drops sharply. ▸ Battery Health Analysis By analyzing the discharge rate, the app calculates a battery health score. If your battery health is declining, you can prepare for a replacement in advance. ▸ Smart Charging Alerts • Immediate alert when the battery drops below your set percentage (e.g., below 20%) • Alert when reaching your target percentage during charging (e.g., unplug advice at 80%) Prevent overcharging and deep discharging to extend your battery's lifespan. ▸ Dark Mode Support Automatically switches between Dark Mode and Light Mode based on your system settings. [Recommended For] • Anyone who wants to extend their smartphone's lifespan • Anyone curious about when their battery drains the most during the day • Anyone who wants to know the perfect time for a battery replacement • Anyone looking to fix their overcharging habits • Anyone experiencing sudden and rapid battery drain [What is Battery Health Score?] Battery Train calculates a health score by analyzing your discharge rate over a certain period. A higher score means your battery is in good condition, while a declining score suggests that battery aging is underway. [Notification Permission Guide] Notification permission is required to use the charging alert feature. You can change this permission at any time in your Settings. Start managing your battery right now.
Screenshots
Verdict
The clearest difference is ads: Stardate at none against Battery Train's shown. Stardate also leads on update cadence (every 3 weeks vs every 2 months). Battery Train's advantage is iOS requirement (15.0 vs 18.0). On price, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Stardate ships an update every 3 weeks, Battery Train every 2 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Stardate | Battery Train |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (24 ratings) — better | — |
| Positive reviews | 78.6% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Neptune Day, LLC | JAEMIN LEE |
In-app purchases
Stardate
No in-app purchases
Battery Train
No in-app purchases









