# ctt light vs Reeflo

The clearest difference is in-app purchases: ctt light at none against Reeflo's 2. ctt light also leads on iOS requirement (12.3 vs 17.0). Reeflo's advantage is update cadence (every 6 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Reeflo sells 2 in-app purchases, starting at $4.99 per month. ctt light asks for nothing beyond the download.

ctt light ships an update every 2 months, Reeflo every 6 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ctt light | Reeflo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Size | 334 MB | 8 MB |
| Requires iOS | **12.3** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CIAN-TIAN Technology Ltd.](https://appshunter.io/developer/1551880952) | [Develak](https://appshunter.io/developer/1803580275) |

## What reviewers say

### ctt light

[App page](https://appshunter.io/ios/app/ctt-light/id6745014818)

**Features:** macOS Compatibility

**In-app purchases:** none


### Reeflo

[App page](https://appshunter.io/ios/app/reeflo-reef-aquarium-tracker/id6777350925)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reeflo Pro Monthly | $4.99 | per month |
| Reeflo Pro Annual | $29.99 | per year |


## Frequently asked questions

### Is ctt light free?

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

### Is Reeflo free?

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

### Do ctt light or Reeflo have ads?

Neither ctt light nor Reeflo shows ads.

### Which is updated more often, ctt light or Reeflo?

ctt light ships an update every 2 months, and Reeflo every 6 days. Most recently, ctt light was updated on October 30, 2026 and Reeflo on October 29, 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.*