# SP Grid Viewer vs Habit Progress Tracker

The clearest difference is in-app purchases: SP Grid Viewer at none against Habit Progress Tracker's 3. SP Grid Viewer also leads on device support (3 vs 1) and iOS requirement (15.6 vs 26.0). Habit Progress Tracker's advantage is update cadence (every 3 weeks vs every 4 months). On price and ads there is nothing between them.

Both are free to download. Habit Progress Tracker sells 3 in-app purchases, starting at $1.99 per month. SP Grid Viewer asks for nothing beyond the download.

SP Grid Viewer ships an update every 4 months, Habit Progress Tracker every 3 weeks. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | SP Grid Viewer | Habit Progress Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 83 MB | 26 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Stage Precision GmbH](https://appshunter.io/developer/1852817409) | [Aleksander Stojanowski](https://appshunter.io/developer/1793980063) |

## What reviewers say

### SP Grid Viewer

[App page](https://appshunter.io/ios/app/sp-grid-viewer/id6741116815)

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

**In-app purchases:** none


### Habit Progress Tracker

[App page](https://appshunter.io/ios/app/habit-progress-tracker-spark/id6741385194)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spark+ | $1.99 | per month |
| Spark+ | $1.99 | per month |
| Spark+ | $19.99 | per year |


## Frequently asked questions

### Is SP Grid Viewer free?

SP Grid Viewer is free to download, with no in-app purchases.

### Is Habit Progress Tracker free?

Habit Progress Tracker is free to download, with in-app purchases available.

### Do SP Grid Viewer or Habit Progress Tracker have ads?

Neither SP Grid Viewer nor Habit Progress Tracker shows ads.

### Which is updated more often, SP Grid Viewer or Habit Progress Tracker?

SP Grid Viewer ships an update every 4 months, and Habit Progress Tracker every 3 weeks. Most recently, SP Grid Viewer was updated on September 18, 2026 and Habit Progress Tracker on September 17, 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.*