# Big Daddy vs Surely

The clearest difference is in-app purchases: Surely at none against Big Daddy's 4. Surely also leads on update cadence (every 2 days vs every 2 months) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Big Daddy sells 4 in-app purchases, starting at $0.99 per month. Surely asks for nothing beyond the download.

Big Daddy ships an update every 2 months, Surely every 2 days. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Big Daddy | Surely |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (474 ratings)](https://appshunter.io/ios/app/big-daddy-pregnancy-tracker/id1447942380/reviews)** | — |
| Number of ratings | **474** | — |
| Positive reviews | 71.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 197 MB | 59 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Christopher Deutsch](https://appshunter.io/developer/1447942379) | [Aartas Care Private Limited](https://appshunter.io/developer/1511706616) |

## What reviewers say

### Big Daddy

[App page](https://appshunter.io/ios/app/big-daddy-pregnancy-tracker/id1447942380)

This app provides expectant fathers with weekly updates on their baby's development and practical advice to support their partner. It offers visual size comparisons, doctor-reviewed articles, and tools like a contraction timer and birth prep checklists.

**Highlights:** Weekly baby development tracking, Visual size comparisons, Doctor-reviewed pregnancy articles, Contraction timer, Birth preparation checklists, Baby name shortlist

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $0.99 | per month |
| Pregnancy Pass | $4.99 | per year |
| Full Access | $2.99 | one-time |
| Lifetime Access | $12.99 | one-time |

**What reviewers like**

- 👍 Very informative and helpful
- 😂 Humorous comparisons and analogies
- 👨‍👩‍👧‍👦 Great for expectant fathers
- 💡 Easy to understand explanations
- ✅ Useful checklists and counters

**What reviewers complain about**

- 💰 Requires payment for full features
- 🤔 Some passive-aggressive comments
- 🤷 Missing information on specific conditions (HG)
- ⚙️ Formatting issues in recent versions
- 📏 Lacks metric to standard conversion option

**Reported bugs**

- Formatting in articles has gone awry
- Crashed upon opening

**Requested features**

- Option to convert measurements from metric to standard
- Add a sharing function for weekly updates
- More information on Hyperemesis Gravidarum (HG)
- Add gender selection option
- Daily notifications of interesting info


### Surely

[App page](https://appshunter.io/ios/app/surely/id6765725713)

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

**In-app purchases:** none


## Frequently asked questions

### Is Big Daddy free?

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

### Is Surely free?

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

### Do Big Daddy or Surely have ads?

Neither Big Daddy nor Surely shows ads.

### Which is updated more often, Big Daddy or Surely?

Big Daddy ships an update every 2 months, and Surely every 2 days. Most recently, Big Daddy was updated on October 14, 2026 and Surely on October 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.*