# InfluxApp vs StackDays

The clearest difference is in-app purchases: InfluxApp at none against StackDays's 3. InfluxApp also leads on ads (none vs shown). StackDays's advantage is update cadence (weekly vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. StackDays sells 3 in-app purchases, starting at $2.99 per month. InfluxApp asks for nothing beyond the download.

InfluxApp ships an update every 5 months, StackDays weekly. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | InfluxApp | StackDays |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | — |
| Size | 23 MB | 97 MB |
| Requires iOS | **14.0** | 15.3 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [InfluxHq ltd](https://appshunter.io/developer/1119203081) | [RHH LLC](https://appshunter.io/developer/1881934615) |

## What reviewers say

### InfluxApp

[App page](https://appshunter.io/ios/app/influxapp/id1119203082)

This app allows gym members to book classes and appointments, track their workouts, and connect with training partners. Stay updated with your fitness journey and gym activities.

**Highlights:** Book classes and appointments, Track workouts, Support training partners, Stay updated on gym activities, Easy to use interface

**Features:** Vision Pro support

**In-app purchases:** none


### StackDays

[App page](https://appshunter.io/ios/app/stackdays-habit-tracker/id6796375407)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $2.99 | per month |
| Annual Pro | $24.99 | per year |
| Lifetime Pro | $59.99 | one-time |


## Frequently asked questions

### Is InfluxApp free?

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

### Is StackDays free?

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

### Do InfluxApp or StackDays have ads?

StackDays shows ads; InfluxApp does not.

### Which is updated more often, InfluxApp or StackDays?

InfluxApp ships an update every 5 months, and StackDays weekly. Most recently, InfluxApp was updated on October 7, 2026 and StackDays on October 24, 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.*