# FLEX SIGN Anode vs NixiTubeClock

The clearest difference is price: FLEX SIGN Anode at Free against NixiTubeClock's $1.99. FLEX SIGN Anode also leads on iOS requirement (15.6 vs 26.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

FLEX SIGN Anode is free to download; NixiTubeClock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FLEX SIGN Anode ships an update fortnightly, NixiTubeClock every 3 weeks. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | FLEX SIGN Anode | NixiTubeClock |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 15 MB | 31 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [德林 王](https://appshunter.io/developer/1242743184) | [kohei yamane](https://appshunter.io/developer/1239055575) |

## What reviewers say

### FLEX SIGN Anode

[App page](https://appshunter.io/ios/app/flex-sign-anode/id1474597528)

**Features:** macOS Compatibility

**In-app purchases:** none


### NixiTubeClock

[App page](https://appshunter.io/ios/app/nixitubeclock/id6757656216)

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

**In-app purchases:** none


## Frequently asked questions

### Is FLEX SIGN Anode free?

FLEX SIGN Anode is free to download, with no in-app purchases.

### Is NixiTubeClock free?

NixiTubeClock costs $1.99, with no in-app purchases.

### Do FLEX SIGN Anode or NixiTubeClock have ads?

Neither FLEX SIGN Anode nor NixiTubeClock shows ads.

### Which is updated more often, FLEX SIGN Anode or NixiTubeClock?

FLEX SIGN Anode ships an update fortnightly, and NixiTubeClock every 3 weeks. Most recently, FLEX SIGN Anode was updated on October 11, 2026 and NixiTubeClock on October 12, 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.*