# NUS Module Planner vs Sum Serenity

The clearest difference is in-app purchases: NUS Module Planner at none against Sum Serenity's 1. NUS Module Planner also leads on update cadence (weekly vs every 8 months). Sum Serenity's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sum Serenity sells 1 one-off in-app purchase. NUS Module Planner asks for nothing beyond the download.

NUS Module Planner ships an update weekly, Sum Serenity every 8 months. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NUS Module Planner | Sum Serenity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 8 months |
| Size | 21 MB | 28 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Clarence Chng](https://appshunter.io/developer/963958848) | [Blossom Labs Ltd](https://appshunter.io/developer/1723890403) |

## What reviewers say

### NUS Module Planner

[App page](https://appshunter.io/ios/app/nus-module-planner/id1633785814)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sum Serenity

[App page](https://appshunter.io/ios/app/sum-serenity-mental-maths/id6475314608)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Serenity Seeker | $1.99 | one-time |


## Frequently asked questions

### Is NUS Module Planner free?

NUS Module Planner is free to download, with no in-app purchases.

### Is Sum Serenity free?

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

### Do NUS Module Planner or Sum Serenity have ads?

NUS Module Planner shows ads; Sum Serenity does not.

### Which is updated more often, NUS Module Planner or Sum Serenity?

NUS Module Planner ships an update weekly, and Sum Serenity every 8 months. Most recently, NUS Module Planner was updated on October 11, 2026 and Sum Serenity 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.*