Comparison

Lehrer Lämpel vs Document Camera

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Lehrer Lämpel

Read full description

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!

About

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.

Highlights
  • 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
Read full description

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

Document Camera4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Lehrer Lämpel versus Document Camera: the parameters behind the verdict, then further details
ParameterLehrer LämpelDocument Camera
Price$0.99Free — better
Rating—4.5 (338 ratings) — better
Positive reviews—61.5% of reviews
Number of ratings—338 — better
Update frequencyEvery 38 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPadiPhone, iPad — better
Requires iOS9.3 — better16.0
Further details — not scored
Size8 MB20 MB
Age rating4+4+
DeveloperClaus ZinnSwiftKick 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)
Show 1 more
  • Limited rotation options

Requested features

2 requests
  • Support for portrait mode
  • Option to rotate document 90 degrees

In-app purchases

None

Lehrer Lämpel

No in-app purchases

None

Document Camera

No in-app purchases

Questions

Is Lehrer Lämpel free?
Lehrer Lämpel costs $0.99, with no in-app purchases.
Is Document Camera free?
Document Camera is free to download, with no in-app purchases.
Do Lehrer Lämpel or Document Camera have ads?
Neither Lehrer Lämpel nor Document Camera shows ads.
Which is updated more often, Lehrer Lämpel or Document Camera?
Lehrer Lämpel ships an update every 38 months, and Document Camera monthly. Most recently, Lehrer Lämpel was updated on September 24, 2026 and Document Camera on September 22, 2026.

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