# Otto vs Stack My Trails

The clearest difference is price: Otto at Free against Stack My Trails's $1.99. Stack My Trails's advantage is in-app purchases (none vs 14) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Otto is free to download; Stack My Trails costs $1.99 up front. Otto sells 12 in-app purchases, starting at $4.99 per month. Stack My Trails asks for nothing beyond the download.

Otto ships an update every 5 days, Stack My Trails weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Otto | Stack My Trails |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.8 (340 ratings)](https://appshunter.io/ios/app/otto-daily-tasks-virtual-pet/id6677016305/reviews)** | — |
| Number of ratings | **340** | — |
| Positive reviews | 76.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 145 MB | 61 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Vladimir Senchikhin](https://appshunter.io/developer/1878095109) |

## What reviewers say

### Otto

[App page](https://appshunter.io/ios/app/otto-daily-tasks-virtual-pet/id6677016305)

Build healthy habits and stay organized with a virtual pet companion. This app combines a planner, to-do list, and habit tracker to make self-care fun and achievable, especially for those managing ADHD. Earn rewards and watch your pet grow as you complete daily tasks.

**Highlights:** Habit tracker, Daily planner, To-do list, Virtual pet companion, ADHD support features, Gamified progress tracking, Customizable pet

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Super Otto | $4.99 | per month |
| Super Otto | $4.99 | per month |
| Super Otto | $9.99 | per month |
| Super Otto | $9.99 | per month |
| Super Otto | $19.99 | per year |
| Super Otto | $19.99 | per year |
| Super Otto | $29.99 | per year |
| Super Otto | $29.99 | per year |
| Super Otto | $49.99 | per year |
| Super Otto Lifetime | Free | one-time |
| Super Otto Lifetime | $9.99 | one-time |
| Super Otto Lifetime | $79.99 | one-time |

**What reviewers like**

- 💜 Cute and fun app
- 👍 Helpful for building healthy habits
- 🎉 Motivating and rewarding
- 🤸‍♀️ Improves health and energy levels

**What reviewers complain about**

- 🐛 Occasional loading issues
- 🔒 Subscription restoration problems
- 🚫 Alleged plagiarism of another app

**Reported bugs**

- Loading screen gets stuck
- Subscription restoration not working

**Requested features**

- Home screen widget
- Lock screen widget
- Ability to edit tasks


### Stack My Trails

[App page](https://appshunter.io/ios/app/stack-my-trails/id6759326170)

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

**In-app purchases:** none


## Frequently asked questions

### Is Otto free?

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

### Is Stack My Trails free?

Stack My Trails costs $1.99, with no in-app purchases.

### Do Otto or Stack My Trails have ads?

Otto shows ads; Stack My Trails does not.

### Which is updated more often, Otto or Stack My Trails?

Otto ships an update every 5 days, and Stack My Trails weekly. Most recently, Otto was updated on October 24, 2026 and Stack My Trails on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*