# BatterySync vs LookCalendar

The clearest difference is in-app purchases: LookCalendar at none against BatterySync's 2. LookCalendar also leads on update cadence (every 2 days vs every 2 months). BatterySync's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. BatterySync sells 2 in-app purchases, starting at $3.99 per month. LookCalendar asks for nothing beyond the download.

BatterySync ships an update every 2 months, LookCalendar every 2 days. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | BatterySync | LookCalendar |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 61 MB | 8 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Epsilon Labs, LLC.](https://appshunter.io/developer/1773895537) | [eunkyu choi](https://appshunter.io/developer/6792032537) |

## What reviewers say

### BatterySync

[App page](https://appshunter.io/ios/app/batterysync/id6740754706)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BatterySync Premium Monthly | $3.99 | per month |
| BatterySync Premium Yearly | $39.99 | per year |


### LookCalendar

[App page](https://appshunter.io/ios/app/lookcalendar/id6792032535)

See your entire month on your Lock Screen and Apple Watch. Customize today's date highlight and calendar styles. Pro features allow instant opening of your preferred calendar app from the widget.

**Highlights:** Full month view on Lock Screen, Today's date highlighting, Multiple calendar styles, Weekday display toggle, Tap widget to open preferred calendar app, Monthly calendar on Apple Watch, Calendar event indicators

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BatterySync free?

BatterySync is free to download, with in-app purchases available.

### Is LookCalendar free?

LookCalendar is free to download, with no in-app purchases.

### Do BatterySync or LookCalendar have ads?

Neither BatterySync nor LookCalendar shows ads.

### Which is updated more often, BatterySync or LookCalendar?

BatterySync ships an update every 2 months, and LookCalendar every 2 days. Most recently, BatterySync was updated on September 29, 2026 and LookCalendar on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*