# primr vs CRUMB

The clearest difference is price: primr at Free against CRUMB's $7.99. primr also leads on rating (5.0 vs 4.4) and review sentiment (83% vs 56%). CRUMB's advantage is update cadence (weekly vs every 2 months) and ratings volume (138 vs 2). On ads, in-app purchases, monetization model and device support there is nothing between them.

primr is free to download; CRUMB costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

primr holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: CRUMB has 138 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 83% of primr's written reviews are positive against 56% of CRUMB's.

primr ships an update every 2 months, CRUMB weekly. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | primr | CRUMB |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/primr/id1352122058/reviews)** | [4.4 (138 ratings)](https://appshunter.io/ios/app/crumb/id1639868071/reviews) |
| Number of ratings | 2 | **138** |
| Positive reviews | **83.3% of reviews** | 55.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Best chart rank | — | **#92** |
| Size | 39 MB | 496 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daily Prompt Ltd](https://appshunter.io/developer/1352122057) | [Vital Group Limited](https://appshunter.io/developer/1355662516) |

## What reviewers say

### primr

[App page](https://appshunter.io/ios/app/primr/id1352122058)

Enhance your focus and productivity with binaural beats and guided meditation. Track your focus improvement over time and unlock new sound packs designed for creativity and productivity.

**Highlights:** Binaural beats for focus, Guided meditation sessions, Focus rating after each session, Track focus improvement over time, Future sound packs for creativity

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

**In-app purchases:** none


### CRUMB

[App page](https://appshunter.io/ios/app/crumb/id1639868071)

**Currently charting:** #92 Top Paid · Productivity (US App Store)

Explore and build electronic circuits in an interactive 3D environment. Learn circuit basics, experiment with components, and analyze performance with built-in tools without the risk of damaging real parts.

**Highlights:** Interactive 3D circuit construction, Wide selection of electronic components, Study transistors and audio filtering, Program EEPROMs, Built-in oscilloscope and analysis views, Prototype analysis before real-world construction

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great for beginners
- 💡 Good for learning new skills
- ✨ Simple to put things together
- 🎨 Great graphics
- 🧩 Plenty of components

**What reviewers complain about**

- ❌ Very limited components
- ❌ Lacks modern components
- 🐛 Crashing frequently
- 🐛 App crashes when using corners
- 🐛 Crashing on Mac

**Reported bugs**

- App crashes when using the “corners” option on jumper wires
- Experienced some crashing on Mac
- Component images do not rotate
- Power rails are backwards related to real life breadboards
- Program counters (74HC161) do not reset to 0 on a reset signal

**Requested features**

- Implement modern components (TI IC, LTC series)
- Add 12 segment display
- Add Arduino and other microcontrollers
- Add a spot to code Arduino/microcontrollers
- Allow custom wire colors


## Frequently asked questions

### Is primr free?

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

### Is CRUMB free?

CRUMB costs $7.99, with no in-app purchases.

### Which has better reviews, primr or CRUMB?

primr is rated higher. primr averages 5.0 out of 5 from 2 ratings, while CRUMB averages 4.4 from 138 ratings.

### Do primr or CRUMB have ads?

Neither primr nor CRUMB shows ads.

### Which is updated more often, primr or CRUMB?

primr ships an update every 2 months, and CRUMB weekly. Most recently, primr was updated on October 9, 2026 and CRUMB on October 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.*