# SUNSATHI SOLAR vs TrueLevel

The clearest difference is in-app purchases: SUNSATHI SOLAR at none against TrueLevel's 1. SUNSATHI SOLAR also leads on iOS requirement (15.6 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TrueLevel sells 1 one-off in-app purchase. SUNSATHI SOLAR asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 14, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | SUNSATHI SOLAR | TrueLevel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 37 MB | 3 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [无锡乐伏网络科技有限公司](https://appshunter.io/developer/1197246083) | [Daniil Mukashev](https://appshunter.io/developer/1833839105) |

## What reviewers say

### SUNSATHI SOLAR

[App page](https://appshunter.io/ios/app/sunsathi-solar/id6746159158)

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

**In-app purchases:** none


### TrueLevel

[App page](https://appshunter.io/ios/app/truelevel-bubble-level-tool/id6760949015)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrueLevel Pro | $3.99 | one-time |


## Frequently asked questions

### Is SUNSATHI SOLAR free?

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

### Is TrueLevel free?

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

### Do SUNSATHI SOLAR or TrueLevel have ads?

Neither SUNSATHI SOLAR nor TrueLevel shows ads.

### Which is updated more often, SUNSATHI SOLAR or TrueLevel?

SUNSATHI SOLAR ships an update monthly, and TrueLevel monthly. Most recently, SUNSATHI SOLAR was updated on October 14, 2026 and TrueLevel on September 27, 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.*