Lehrer Lämpel vs Document Camera
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lehrer Lämpel
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The app implements the popular number wheels known from many school books; it supports primary school children to practise their skills in basic arithmetic: addition, subtraction, multiplication and division. The learner is given a wheel of twenty segments, grouped into an inner and an outer ring around a pivot element. Half of the segments are pre-filled with numbers. Now, learners need to compute the missing numbers, given the pivot element and the chosen operation (addition, or multiplication). The app offers a training and a challenge mode. In the training mode, pupils can ask Lehrer Lämpel for help at any time. In the challenge mode, a timer of one minute counts backwards (more time is allocated for more difficult tasks); segments have to filled out in the given order. Can you solve the wheel under a minute? -- For the challenge mode, there is a high score table maintaining the top 20 scores. The app supports an unlimited number of randomised exercises, and three levels of difficulty. The app supports English, French and German. Available on the iPad, for iOS9 or later. The app is ad-free. No data is being collected. No web access is required. The high score is maintained locally. Please consider leaving a review. This helps a lot. Thanks!
Document Camera
Turn your iPhone into a document camera for seamless workspace sharing. Ideal for remote learning and in-classroom presentations, it integrates with popular video conferencing tools and supports screen mirroring.
- Transform iPhone into a document camera
- Screen sharing for video conferencing
- Remote learning tool
- Smart flashlight and auto-leveling
- Zoom, pan, and freeze frame
- AirPlay screen mirroring support
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Transform your iPhone into the best document camera on the market with Doc Cam! Doc Cam is a straightforward app for sharing your workspace with your students, just like a document camera or old school overhead projector. Doc Cam was designed with the needs of the remote learning classroom in mind. It’s compatible with Zoom, Google Meet, Microsoft Teams, and other services through screen mirroring, all with easy step-by-step guides for setup. For teachers who have already transitioned back to the classroom, you can still use Doc Cam with modern classrooms outfitted with computers or projectors compatible with AirPlay Screen Mirroring. DOC CAM FEATURES 1. Works with Zoom, Google Meet, Screen Mirroring and more. 2. Perfect for remote learning. 3. Zoom and pan the camera. 4. Smart Flashlight - distributes the lighting evenly across the entire document camera image when the flashlight is enabled. 5. Auto Level - keeps the document camera image level even when your phone isn't. 6. Freeze video frame. 7. Transition back to the classroom with AirPlay support. 8. And more!
Screenshots
Verdict
The clearest difference is price: Document Camera at Free against Lehrer Lämpel's $0.99. Document Camera also leads on update cadence (monthly vs every 38 months). Lehrer Lämpel's advantage is iOS requirement (9.3 vs 16.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Document Camera is free to download; Lehrer Lämpel costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Lehrer Lämpel ships an update every 38 months, Document Camera monthly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | Lehrer Lämpel | Document Camera |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 4.5 (338 ratings) — better |
| Positive reviews | — | 61.5% of reviews |
| Number of ratings | — | 338 — better |
| Update frequency | Every 38 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 9.3 — better | 16.0 |
| Further details — not scored | ||
| Size | 8 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Claus Zinn | SwiftKick Mobile LLC |
Bugs and requests
Lehrer Lämpel
Not enough reviews yet to summarise bugs or requests.
Document Camera
Reported bugs
6 issues- App does not open
- App freezes on splash screen
- App requires access but no options to select
- App gets stuck on Home Screen
- Poor camera quality (fuzzy/grainy)
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- Limited rotation options
Requested features
2 requests- Support for portrait mode
- Option to rotate document 90 degrees
In-app purchases
Lehrer Lämpel
No in-app purchases
Document Camera
No in-app purchases
Questions
Is Lehrer Lämpel free?
Is Document Camera free?
Do Lehrer Lämpel or Document Camera have ads?
Which is updated more often, Lehrer Lämpel or Document Camera?
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