# FlickerSpec vs TrueLevel

The clearest difference is iOS requirement: TrueLevel at 17.6 against FlickerSpec's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. FlickerSpec sells 1 one-off in-app purchase and TrueLevel sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

FlickerSpec ships an update every 4 weeks, TrueLevel monthly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | FlickerSpec | TrueLevel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Size | 12 MB | 3 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Corey Thomas Slick](https://appshunter.io/developer/1818871667) | [Daniil Mukashev](https://appshunter.io/developer/1833839105) |

## What reviewers say

### FlickerSpec

[App page](https://appshunter.io/ios/app/flickerspec-led-flicker-test/id6759629660)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlickerSpec Pro | $49.99 | one-time |


### 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 FlickerSpec free?

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

### Is TrueLevel free?

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

### Do FlickerSpec or TrueLevel have ads?

Neither FlickerSpec nor TrueLevel shows ads.

### Which is updated more often, FlickerSpec or TrueLevel?

FlickerSpec ships an update every 4 weeks, and TrueLevel monthly. Most recently, FlickerSpec was updated on October 29, 2026 and TrueLevel on October 25, 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.*