# SDB vs ParivarBook

The clearest difference is ads: SDB at none against ParivarBook's shown. ParivarBook's advantage is update cadence (every 4 days vs every 2 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SDB ships an update every 2 weeks, ParivarBook every 4 days. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SDB | ParivarBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 130 MB | 77 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [COMMUNITIES HERITAGE LIMITED](https://appshunter.io/developer/1583189998) | [Piyush Jayani](https://appshunter.io/developer/1896645192) |

## What reviewers say

### SDB

[App page](https://appshunter.io/ios/app/sdb-one/id6448426565)

**Features:** macOS Compatibility

**In-app purchases:** none


### ParivarBook

[App page](https://appshunter.io/ios/app/parivarbook/id6769259152)

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

**In-app purchases:** none


## Frequently asked questions

### Is SDB free?

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

### Is ParivarBook free?

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

### Do SDB or ParivarBook have ads?

ParivarBook shows ads; SDB does not.

### Which is updated more often, SDB or ParivarBook?

SDB ships an update every 2 weeks, and ParivarBook every 4 days. Most recently, SDB was updated on October 17, 2026 and ParivarBook on October 14, 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.*