# Lock Tool vs Saya Installer App

Lock Tool and Saya Installer App are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Lock Tool | Saya Installer App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/saya-installer-app/id1566822050/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free |
| Size | 19 MB | 29 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Zhixin Wulian Technology Co., Ltd.](https://appshunter.io/developer/1521588847) | [IconnectZone Inc](https://appshunter.io/developer/1364790326) |

## What reviewers say

### Lock Tool

[App page](https://appshunter.io/ios/app/lock-tool/id1419601294)

**Features:** macOS Compatibility

**In-app purchases:** none


### Saya Installer App

[App page](https://appshunter.io/ios/app/saya-installer-app/id1566822050)

This utility app assists installers in managing the process of setting up meters and devices on property sites. It streamlines the installation workflow for professionals in the field.

**Highlights:** Meter installation management, Device installation management, Property site workflow, Installer assistance

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

**In-app purchases:** none


## Frequently asked questions

### Is Lock Tool free?

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

### Is Saya Installer App free?

Saya Installer App is free to download, with no in-app purchases.

### Do Lock Tool or Saya Installer App have ads?

Neither Lock Tool nor Saya Installer App shows ads.

### Which is updated more often, Lock Tool or Saya Installer App?

Lock Tool ships an update every 3 months, and Saya Installer App every 3 months. Most recently, Lock Tool was updated on October 16, 2026 and Saya Installer App on October 11, 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.*