# Number Line Math K2 vs Phonogram Sounds

The clearest difference is rating: Phonogram Sounds at 4.0 against Number Line Math K2's 2.0. Phonogram Sounds also leads on ratings volume (84 vs 3) and update cadence (every 6 months vs every 12 months). Number Line Math K2's advantage is iOS requirement (10.0 vs 15.0). 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.

Phonogram Sounds holds the better App Store score, 4.0 against 2.0. That said, the two scores are not equally well evidenced: Phonogram Sounds has 84 ratings behind it against 3, so its average is the more settled of the two.

Number Line Math K2 ships an update every 12 months, Phonogram Sounds every 6 months. The most recent releases landed on October 2, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Number Line Math K2 | Phonogram Sounds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/number-line-math-k2/id500559584/reviews) | **[4.0 (84 ratings)](https://appshunter.io/ios/app/phonogram-sounds/id797098295/reviews)** |
| Number of ratings | 3 | **84** |
| Positive reviews | — | 69.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 months** |
| Monetization | Free | Free |
| Size | 34 MB | 27 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Classroom Focused Software](https://appshunter.io/developer/406741679) | [All About Learning Press, Inc.](https://appshunter.io/developer/786428125) |

## What reviewers say

### Number Line Math K2

[App page](https://appshunter.io/ios/app/number-line-math-k2/id500559584)

This app helps young learners practice addition, subtraction, and comparison skills up to 20 using an interactive number line. Users can customize problems to focus on different unknown quantities and specific math facts.

**Highlights:** Addition and subtraction up to 20, More Than/Less Than comparisons, Interactive number line tool, Customizable unknown quantities, Selectable math facts to practice

**Features:** macOS Compatibility

**In-app purchases:** none


### Phonogram Sounds

[App page](https://appshunter.io/ios/app/phonogram-sounds/id797098295)

This interactive app provides clear audio pronunciations for letter sounds and combinations, featuring all 72 basic phonograms from a popular language arts curriculum. It's designed to support reading and spelling development for learners of all ages.

**Highlights:** Hear correct pronunciation of sounds, Clear enunciation of letters and combinations, Includes all 72 basic phonograms, Supports reading and spelling skills, Interactive learning experience

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great supplement for AAS/AAR
- 👍 Helpful for parents/teachers
- 👍 Easy to use
- 👍 Clear phonetic sounds
- 👍 Good for practice

**What reviewers complain about**

- 👎 Incorrect 'r' sound
- 👎 Incomplete phonogram set
- 👎 Not a standalone lesson
- 👎 Not for fun
- 👎 Missing Spalding compatibility

**Reported bugs**

- R says /er/ instead of /r/
- Sound not working
- App crashes
- No sound when tapping phonograms
- Sound only works with ringer on

**Requested features**

- Videos showing lip/tongue placement
- Interactive game app
- App for building words/movable tiles
- Level-based sound availability
- Enlarging tapped tile


## Frequently asked questions

### Is Number Line Math K2 free?

Number Line Math K2 is free to download, with no in-app purchases.

### Is Phonogram Sounds free?

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

### Which has better reviews, Number Line Math K2 or Phonogram Sounds?

Phonogram Sounds is rated higher. Number Line Math K2 averages 2.0 out of 5 from 3 ratings, while Phonogram Sounds averages 4.0 from 84 ratings.

### Do Number Line Math K2 or Phonogram Sounds have ads?

Neither Number Line Math K2 nor Phonogram Sounds shows ads.

### Which is updated more often, Number Line Math K2 or Phonogram Sounds?

Number Line Math K2 ships an update every 12 months, and Phonogram Sounds every 6 months. Most recently, Number Line Math K2 was updated on October 2, 2026 and Phonogram Sounds on October 20, 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.*