# PRIMO vs PETS圣题库

The clearest difference is in-app purchases: PRIMO at none against PETS圣题库's 10. PRIMO also leads on iOS requirement (8.0 vs 11.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PETS圣题库 sells 10 one-off in-app purchases. PRIMO asks for nothing beyond the download.

PRIMO ships an update every 3 weeks, PETS圣题库 monthly. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | PRIMO | PETS圣题库 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 63 MB | 43 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Kulebu Information Technology Co., Ltd](https://appshunter.io/developer/919809571) | [Sheng Cai E-books (Wuhan) Co., Ltd.](https://appshunter.io/developer/1448965022) |

## What reviewers say

### PRIMO

[App page](https://appshunter.io/ios/app/primo/id1424842142)

**Features:** macOS Compatibility

**In-app purchases:** none


### PETS圣题库

[App page](https://appshunter.io/ios/app/pets/id1567845435)

This app provides a comprehensive question bank for the National English Test (PETS) exams, offering detailed explanations for each question. It supports learning and practice anytime, anywhere, across multiple devices like phones and tablets.

**Highlights:** Comprehensive PETS question bank, Detailed answer explanations, Multiple practice modes, Progress tracking, Keyword search for questions, Automatic错题 (wrong question) collection, Smart personalized question generation

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 圣才月卡VIP会员 | $3.99 | one-time |
| 圣才季卡VIP会员 | $9.99 | one-time |
| 88圣才币 | $12.99 | one-time |
| 128圣才币 | $19.99 | one-time |
| 圣才半年卡VIP会员 | $19.99 | one-time |
| 圣才考研半年卡VIP会员 | $19.99 | one-time |
| 168圣才币 | $24.99 | one-time |
| 208圣才币 | $29.99 | one-time |
| 圣才年卡VIP会员 | $29.99 | one-time |
| 圣才考研年卡VIP会员 | $29.99 | one-time |


## Frequently asked questions

### Is PRIMO free?

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

### Is PETS圣题库 free?

PETS圣题库 is free to download, with in-app purchases available.

### Do PRIMO or PETS圣题库 have ads?

Neither PRIMO nor PETS圣题库 shows ads.

### Which is updated more often, PRIMO or PETS圣题库?

PRIMO ships an update every 3 weeks, and PETS圣题库 monthly. Most recently, PRIMO was updated on September 30, 2026 and PETS圣题库 on September 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.*