# Smart Firefly vs Keynius Battery Lock

The clearest difference is update cadence: Keynius Battery Lock at monthly against Smart Firefly's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Smart Firefly ships an update every 6 months, Keynius Battery Lock monthly. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Smart Firefly | Keynius Battery Lock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Size | 206 MB | 51 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Firefly Edge B.V.](https://appshunter.io/developer/1805428654) | [Keynius B.V.](https://appshunter.io/developer/1606427497) |

## What reviewers say

### Smart Firefly

[App page](https://appshunter.io/ios/app/smart-firefly/id1602689890)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keynius Battery Lock

[App page](https://appshunter.io/ios/app/keynius-battery-lock/id6448085886)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smart Firefly free?

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

### Is Keynius Battery Lock free?

Keynius Battery Lock is free to download, with no in-app purchases.

### Do Smart Firefly or Keynius Battery Lock have ads?

Neither Smart Firefly nor Keynius Battery Lock shows ads.

### Which is updated more often, Smart Firefly or Keynius Battery Lock?

Smart Firefly ships an update every 6 months, and Keynius Battery Lock monthly. Most recently, Smart Firefly was updated on October 3, 2026 and Keynius Battery Lock on October 19, 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.*