# #1 Age Calculator vs IDDSI

The clearest difference is review sentiment: #1 Age Calculator at 43% against IDDSI's 0%. #1 Age Calculator also leads on rating (3.4 vs 1.6) and ratings volume (831 vs 14). On price, ads, in-app purchases and monetization model there is nothing between them.

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

#1 Age Calculator holds the better App Store score, 3.4 against 1.6. That said, the two scores are not equally well evidenced: #1 Age Calculator has 831 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 43% of #1 Age Calculator's written reviews are positive against 0% of IDDSI's.

#1 Age Calculator ships an update every 8 months, IDDSI every 21 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | #1 Age Calculator | IDDSI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (831 ratings)](https://appshunter.io/ios/app/1-age-calculator/id402210422/reviews)** | [1.6 (14 ratings)](https://appshunter.io/ios/app/iddsi/id1145593063/reviews) |
| Number of ratings | **831** | 14 |
| Positive reviews | **42.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 21 months |
| Monetization | Free | Free |
| Size | 8 MB | 100 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [HomeSpeechHome PLLC](https://appshunter.io/developer/387234978) | [International Dysphagia Diet Standardisation Initiative Iddsi](https://appshunter.io/developer/1650465352) |

## What reviewers say

### #1 Age Calculator

[App page](https://appshunter.io/ios/app/1-age-calculator/id402210422)

Quickly determine a person's chronological age with this straightforward calculator. It automatically computes age upon entering a birth date and can also calculate age for a past date.

**Highlights:** Automatic chronological age calculation, Enter birth date to calculate age, Calculate age for an earlier date, Simple and fast interface, Reliable results

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 Helpful for work
- 🚀 Loads fast
- 👍 Accurate
- 👍 Great tool for testing/assessments

**What reviewers complain about**

- 🔍 Too many ads
- 🐛 Formatting issues after updates
- 🐛 Compatibility issues with newer devices
- 🔍 Ads block important information

**Reported bugs**

- Screen layout issues after updates
- Calculation errors
- App freezes or crashes

**Requested features**

- Ad-free version
- Landscape mode
- Better formatting for newer devices


### IDDSI

[App page](https://appshunter.io/ios/app/iddsi/id1145593063)

Access the IDDSI framework for food texture and drink thickness testing. This tool provides easy lookup of descriptors and tests, suitable for all ages and care settings to assist individuals with dysphagia.

**Highlights:** IDDSI framework access, Food texture descriptors, Drink thickness tests, Easy lookup, Applicable to all ages, Supports all care settings

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

**In-app purchases:** none


## Frequently asked questions

### Is #1 Age Calculator free?

#1 Age Calculator is free to download, with no in-app purchases.

### Is IDDSI free?

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

### Which has better reviews, #1 Age Calculator or IDDSI?

#1 Age Calculator is rated higher. #1 Age Calculator averages 3.4 out of 5 from 831 ratings, while IDDSI averages 1.6 from 14 ratings.

### Do #1 Age Calculator or IDDSI have ads?

Neither #1 Age Calculator nor IDDSI shows ads.

### Which is updated more often, #1 Age Calculator or IDDSI?

#1 Age Calculator ships an update every 8 months, and IDDSI every 21 months. Most recently, #1 Age Calculator was updated on October 23, 2026 and IDDSI 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.*