# TeraStudy vs Parallel Accounts・Dual Space

The clearest difference is in-app purchases: TeraStudy at none against Parallel Accounts・Dual Space's 6. TeraStudy also leads on update cadence (every 5 days vs every 4 months) and iOS requirement (11.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Parallel Accounts・Dual Space sells 6 in-app purchases, starting at $1.99 per 7 days. TeraStudy asks for nothing beyond the download.

TeraStudy ships an update every 5 days, Parallel Accounts・Dual Space every 4 months. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | TeraStudy | Parallel Accounts・Dual Space |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (282 ratings)](https://appshunter.io/ios/app/parallel-accountsdual-space/id6474973598/reviews)** |
| Number of ratings | — | **282** |
| Positive reviews | — | 11.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | — | Free with in-app purchases |
| Size | 89 MB | 42 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ワンダフルフライ株式会社](https://appshunter.io/developer/1078093943) | [Marius Ardeleanu](https://appshunter.io/developer/1864906471) |

## What reviewers say

### TeraStudy

[App page](https://appshunter.io/ios/app/terastudy/id1599397445)

**Features:** Vision Pro support

**In-app purchases:** none


### Parallel Accounts・Dual Space

[App page](https://appshunter.io/ios/app/parallel-accountsdual-space/id6474973598)

This app lets you run multiple instances of the same application on a single device. Easily manage separate work and personal profiles, social media, or game accounts in a secure, private space. Switch between accounts instantly and manage notifications without conflict.

**Highlights:** Clone apps for dual accounts, Private and secure secondary space, Fast account switching, Manage notifications from all accounts, Intuitive and clean interface, Optional passcode/biometric lock

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Safely organize your accounts | $1.99 | per 7 days |
| Dual Accounts | $2.99 | per 7 days |
| Safely organize your accounts | $5.99 | per 7 days |
| Manage accounts effortlessly | $5.99 | per 7 days |
| Easily switch between accounts | $19.99 | per month |
| Easily switch between accounts | $39.99 | per year |


## Frequently asked questions

### Is TeraStudy free?

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

### Is Parallel Accounts・Dual Space free?

Parallel Accounts・Dual Space is free to download, with in-app purchases available.

### Do TeraStudy or Parallel Accounts・Dual Space have ads?

Neither TeraStudy nor Parallel Accounts・Dual Space shows ads.

### Which is updated more often, TeraStudy or Parallel Accounts・Dual Space?

TeraStudy ships an update every 5 days, and Parallel Accounts・Dual Space every 4 months. Most recently, TeraStudy was updated on October 30, 2026 and Parallel Accounts・Dual Space on November 4, 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.*