# OTPL Solar vs Sianti

The clearest difference is update cadence: Sianti at every 2 days against OTPL Solar's every 3 weeks. OTPL Solar's advantage is iOS requirement (13.0 vs 15.0). 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.

OTPL Solar ships an update every 3 weeks, Sianti every 2 days. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | OTPL Solar | Sianti |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sianti/id6763346174/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | — | Free |
| Size | 58 MB | 64 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AHASOLAR TECHNOLOGIES LIMITED](https://appshunter.io/developer/1632224285) | [jaafar ameer rashid](https://appshunter.io/developer/1895275061) |

## What reviewers say

### OTPL Solar

[App page](https://appshunter.io/ios/app/otpl-solar/id1489169580)

**In-app purchases:** none


### Sianti

[App page](https://appshunter.io/ios/app/sianti/id6763346174)

This app helps car owners track their vehicle's maintenance history and receive timely reminders for upcoming services. It allows users to easily book appointments with their preferred repair shop and communicate directly through the application.

**Highlights:** Comprehensive maintenance log, Smart service reminders, Easy appointment booking, Direct communication with repair shops, Support for multiple vehicles, Dark mode option

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

**In-app purchases:** none


## Frequently asked questions

### Is OTPL Solar free?

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

### Is Sianti free?

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

### Do OTPL Solar or Sianti have ads?

Neither OTPL Solar nor Sianti shows ads.

### Which is updated more often, OTPL Solar or Sianti?

OTPL Solar ships an update every 3 weeks, and Sianti every 2 days. Most recently, OTPL Solar was updated on October 26, 2026 and Sianti on October 28, 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.*